The disk drive has 800 cylinders, a bulk transfer rate of 506,880 bytes per second, and using double buffering reduces the time to transfer 20 blocks.
a. A track on this disk has the following information:Number of blocks per track = 20Size of each block = 512 bytesSize of the interblock gap = 128 bytesa. The total capacity of a track is the sum of the size of all the blocks and interblock gaps:Total capacity of a track = (Number of blocks per track) × (Size of each block + Size of the interblock gap)= 20 × (512 + 128) bytes = 12,800 bytes.The useful capacity of the track is the total size of the blocks:Useful capacity of a track = (Number of blocks per track) × (Size of each block)= 20 × 512 bytes = 10,240 bytes.
b. The number of cylinders is the number of tracks in the disk unit:Number of cylinders = (Number of tracks per surface) × (Number of surfaces)= 400 × 2 = 800 cylinders.
c. The total capacity of a cylinder is the sum of the total capacities of all the tracks in the cylinder:Total capacity of a cylinder = (Number of tracks per surface) × (Total capacity of a track)= 400 × 12,800 bytes = 5,120,000 bytes.The useful capacity of a cylinder is the sum of the useful capacities of all the tracks in the cylinder:Useful capacity of a cylinder = (Number of tracks per surface) × (Useful capacity of a track)= 400 × 10,240 bytes = 4,096,000 bytes.
d. The total capacity of the disk pack is the sum of the total capacities of all the cylinders in the pack:Total capacity of the disk pack = (Number of cylinders) × (Total capacity of a cylinder)= 800 × 5,120,000 bytes = 4,096,000,000 bytes.The useful capacity of the disk pack is the sum of the useful capacities of all the cylinders in the pack:Useful capacity of the disk pack = (Number of cylinders) × (Useful capacity of a cylinder)= 800 × 4,096,000 bytes = 3,276,800,000 bytes.
e. The rotational speed of the disk pack is 2,400 rpm. Therefore, the disk makes 2,400/60 = 40 revolutions per second. Each revolution takes 1/40 = 0.025 seconds. Therefore, the rotational delay (rd) is half of this time:rd = 0.025/2 = 0.0125 seconds.The transfer rate (tr) is the number of bytes that can be transferred in one second. The time to transfer one block is the block transfer time (btt).tr = (Total capacity of a track)/(Time to transfer the track)tr = (12,800 bytes)/(0.025 seconds)tr = 512,000 bytes per second.btt = (Size of each block)/(Transfer rate)btt = (512 bytes)/(512,000 bytes per second)btt = 0.001 seconds = 1 msec.The bulk transfer rate is the rate of transferring "useful" bytes of data, which exclude interlock gap bytes. Therefore, the bulk transfer rate is the transfer rate (tr) minus the transfer rate of the interlock gap bytes.tr_gap = (Size of the interblock gap)/(Time to transfer the track)tr_gap = (128 bytes)/(0.025 seconds)tr_gap = 5,120 bytes per second.Bulk transfer rate = tr – tr_gap = 512,000 – 5,120 = 506,880 bytes per second.
f. The average time to locate a block is the average seek time plus half of the rotational delay (rd):Average time to locate a block = Average seek time + rd= 30 msec + 0.0125 seconds= 30.0125 seconds.The total time to locate and transfer a single block is the sum of the average seek time, half of the rotational delay, and the block transfer time:Total time to locate and transfer a block = Average time to locate a block + btt= 30.0125 msec + 1 msec= 31.0125 msec.
g. The average time to transfer 20 random blocks is the time to transfer one block times 20, plus the time to locate the blocks:Average time to transfer 20 random blocks = 20 × (Total time to locate and transfer a block)= 20 × 31.0125 msec= 620.25 msec.The time to transfer 20 consecutive blocks can be reduced by using double buffering to save seek time and rotational delay. Double buffering allows the system to start transferring blocks from the second track while the first track is still being read.
Therefore, the average time to transfer 20 consecutive blocks is the time to transfer one block times 20, plus the time to locate the first block, plus half of the rotational delay, plus the time to locate the 20th block:Average time to transfer 20 consecutive blocks = (Total time to locate and transfer a block) + (19 × btt) + (rd/2)= 31.0125 + 19 × 1 + 0.0125 + (30/2)= 49.5125 msec.The time to transfer 20 random blocks is 620.25 msec, while the time to transfer 20 consecutive blocks using double buffering is 49.5125 msec. Therefore, using double buffering reduces the time by a factor of approximately 12.5.
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What command should you run in order to check whether a remote host is connected to your ip network?
The command that should you run in order to check whether a remote host is connected to your IP network is known as the Ping command.
What do you mean by IP network?IP network may be defined as a type of communication between networks that significantly utilized Internet Protocol (IP) to send and receive information in the form of messages between one or more computers. IP stands for Internet Protocol.
The ping command authorizes you to scrutinize if you can able connect to a hostname or an IP address and delivers a fundamental measurement of the quiescence or lag between your connection and the remote device.
Therefore, the ping command is the command that should you run in order to check whether a remote host is connected to your IP network.
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Which of the examples is part client side code
Answer:
a prompt for special characters in a username
Explanation:
in JavaScript, Python a user input is a client sided code
is what the user interacts with when operating a computer.
They can use a keyboard if booting into BSOS or typing in command prompt.
Mouse To move around and click on the tabs or whatever.
And the PC if needing to switch parts, repair, or see whats wrong with them
Easy question how the internet has impacted y’all life
Answer: It has made learning easier, but also increased insecurity about myself, for me.
Explanation:
A data analyst uses _____ to decide which data is relevant to their analysis and which data types and variables are appropriate
Answer:
I believe that the answer is a database organization.
g an os is configured with the round robin cpu scheduling algorithm with a time quantum of 10 milliseconds. if p1 and p2 arrived almost at the same time, with the next burst time of 19 and 32 milliseconds respectively are in the ready queue, in that order. what is the average turn around time of the system, assuming that the context switch time is negligible?
The average turn around time of the system is 31 ms.
What is system?A system is a group of components or parts that work together to form a unified whole. It can refer to a variety of things, from a computer system to a political system or an ecosystem. Generally, a system has an input, a process, and an output. Systematic thinking allows us to break down complex problems into smaller parts, helping us to understand and solve them more effectively. Systems can also be used to increase efficiency and automation, reducing the amount of manual labor and tedious tasks. In addition, systems can help to create structure and consistency, enabling us to predict outcomes and make more informed decisions.
In this case, p1 would be served first since it arrived first in the ready queue. After 10 milliseconds, p1's time quantum will be over and p2 will be served for the next 10 ms. The remaining 9 ms of p1's burst time will be served after p2's time quantum ends.
Therefore, the average turn around time of the system is 31 ms.
Turnaround time = (19 + 32 + 9) / 2 = 31 ms
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Information stored on CD-ROM disc must be read and then erased.True or false?
Answer:
False
Explanation:
You have installed a new 32-bit application on a 64-bit Windows workstation. You would like to review the installation directory for the application. Where would you find the application's install directory?A) Windows\Systems32B) Program FilesC) Program Files (x86)D) AppData
The application's installation directory would most likely be found in option C) Program Files (x86). This is because 32-bit applications are typically installed in this directory on a 64-bit Windows workstation.
When you install a 32-bit application on a 64-bit Windows workstation, the installation directory is typically found in the "Program Files (x86)" folder. This folder is specifically designed for 32-bit applications to ensure compatibility with the 64-bit operating system.
However, it is also possible that the installation directory may be located in a different location depending on the specific application and its installation settings.
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List the three words using in programing LOGIC statements
Answer: If, Than, Else.
Explanation: Programming languages control the flow of a program using logic statements which are a specific form of IF…THEN…ELSE statements.
Programming languages use logic statements, which are a combination of "if", "then," and "else" statements, to regulate the execution of a program.
What are the "if", "then," and "else" statements?The "if or then" statements, together with its optional "else" clause, only require one statement to be performed for each of the two cases. Multiple statements can be combined together to execute more than one statement using a begin/end Block Statement:
if = (If something is true, do it; otherwise, do something else.)
{ if x < 10 then begin
x := x+1;
y := y+1;
end
else}
Even if just one statement is given, a begin/end statement block can be used as an option. This is a typical technique to keep code clean and understandable, as well as to prevent making the usual error of forgetting to add begin/end when later extending a single-line "if or then" statement.
Thus, programming languages use logic statements, which are a combination of "if", "then," and "else" statements, to regulate the execution of a program.
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Given two strings declared as string myS1 = "name" and string myS2 = "number". Which of the following expressions evaluate to true? O myS1 > myS2 myS1 >= myS2 myS1 myS1 == myS2
The following expression evaluate to true is myS1 == myS2.The correct answer is option D.
Among the given expressions, the only one that evaluates to true is option D: `myS1 == myS2`. This is because the `==` operator is used for equality comparison between two strings.
Option A (`myS1 > myS2`) compares the strings lexicographically, based on the Unicode values of their characters. In this case, "name" is not greater than "number" in the lexicographic order, so the expression evaluates to false.
Option B (`myS1 >= myS2`) compares the strings lexicographically as well, but also includes the case when the strings are equal. Since "name" is not greater than or equal to "number" in the lexicographic order, the expression evaluates to false.
Option C (`myS1`) is not a valid expression for comparison. It simply returns the value of the variable `myS1`, which is the string "name".
Therefore, the only expression that evaluates to true is `myS1 == myS2`, as it checks whether the strings are equal. However, in this case, "name" and "number" are not equal, so the expression would actually evaluate to false.
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what is the term for sending emails that imitate legitimate companies?
Answer:
phishing,,,, it imitates the company email so that when you get on the mail it can collect all your data and then can begin to hack using your information such as password
Phishing refers to the malicious attack method by attackers who imitate legitimate companies in sending emails in order to entice people to share their passwords, credit card or other sensitive personal information. ... If you do surrender such information, the attacker will immediately capture your personal information.
a. What is included with ProCirrus and what is extra? (long answer)
ProCirrus is a comprehensive cloud-based computing solution designed for businesses of all sizes. It offers a range of features and capabilities that are included in its standard package, while additional services and features are available as optional add-ons.
The standard package of ProCirrus includes the basic infrastructure necessary to run a business in the cloud. This includes cloud servers, storage, networking, and security features. These features are designed to be highly scalable and can be customized to meet the unique needs of each business. Additionally, ProCirrus provides data backup and disaster recovery services, ensuring that your business data is protected and easily recoverable in the event of a disaster.
In addition to the standard package, ProCirrus offers a range of optional add-ons that can be purchased to enhance the platform's functionality. Some of these add-ons include advanced security features such as intrusion detection and prevention, antivirus, and firewall protection. ProCirrus also offers collaboration and communication tools, such as email, instant messaging, and video conferencing. These tools are designed to improve team communication and collaboration, and can help businesses increase productivity and efficiency.
Other optional add-ons available with ProCirrus include mobile device management, which allows businesses to manage and secure mobile devices used by employees, as well as advanced analytics and reporting tools that can help businesses gain insights into their data and improve decision-making.
Overall, ProCirrus provides businesses with a comprehensive cloud computing solution that includes all of the basic infrastructure and services needed to operate in the cloud, with a range of optional add-ons available to enhance the platform's capabilities.
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Finite automaton (fa) accepts all strings without a double b.
A finite automaton (FA) that accepts all strings without a double "b" can be constructed using a set of states and transitions.
Here's a step-by-step explanation to create such an FA:
1. Define the alphabet: Since we are working with strings containing "a" and "b", our alphabet is Σ = {a, b}.
2. Define the states: We need three states to represent the different situations: q0 (initial state), q1 (seen one "b"), and q2 (seen two consecutive "b"s).
3. Define the initial state: The initial state is q0, where no characters have been processed yet.
4. Define the accepting states: The accepting states are q0 and q1, as they represent strings without a double "b".
5. Define the transitions: Set up the following transitions based on the input character and current state:
- If the current state is q0 and the input is "a", stay in q0 (q0, a) → q0.
- If the current state is q0 and the input is "b", move to q1 (q0, b) → q1.
- If the current state is q1 and the input is "a", move back to q0 (q1, a) → q0.
- If the current state is q1 and the input is "b", move to q2 (q1, b) → q2.
- If the current state is q2 and the input is "a" or "b", stay in q2 (q2, a) → q2 and (q2, b) → q2.
6. Process the input string: Start in the initial state (q0) and apply the transitions based on the input characters. If the final state is an accepting state (q0 or q1), the string is accepted. Otherwise, if the final state is q2, the string is rejected.
By following these steps, you can create a finite automaton that accepts all strings without a double "b".
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could someone please list the psychological impacts of Video games that differ the mind of teenagers. If you’ve previously completed a essay or report on this, please show me as an example. Thank you!
Answer:
Previous studies show that violent video games increase adolescent aggressiveness, but new Dartmouth research finds for the first time that teenagers who play mature-rated, risk-glorifying video games are more likely subsequently to engage in a wide range of behaviors beyond aggression, including alcohol use, smoking.
Explanation:
it has effected me by the way but im fine now it was for a short amount of time
What order of MDA does the player typically notice?
A.
aesthetics, dynamics, mechanics
B.
dynamics, mechanics, aesthetics
C.
mechanics, aesthetics, dynamics
D.
aesthetics, mechanics, dynamics
The order of MDA that the player typically notice is option A: aesthetics, dynamics, mechanics.
The MDA theory is what?Mechanics, Dynamics, and Aesthetics is referred to as MDA. The fundamental components that make up a game's rules, algorithms, and data are known as its mechanics. They serve as the foundation of game design. When a user interacts with a mechanism, certain behaviors are elicited.
Therefore, The aesthetic aspect of the game is first seen by the player. The dynamics can be interacted with by the player, but not the mechanics. Given that they are the ones creating the game, the designer will begin with the mechanics before moving on to the dynamics.
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If you receive the "Cannot display the folder. Microsoft Outlook cannot access the specified folder location" error, you typically need to rename or delete your .ost file. In Outlook, click File > Account Settings > Data Files to find the location of your OST file. Then close Outlook.
Go to the path of OST file, delete or rename the OST file.
Restart your Outlook client, a new OST file will be created.
Typically this file is in C:\Users\YourName\AppData\Local\Microsoft\Outlook
Find your .ost and rename to .bak or .old
Answer:
what is the question??? as if ur answring
Explanation:
If you encounter the error "Cannot display the folder. Microsoft Outlook cannot access the specified folder location," it usually means you need to modify your .ost file.
To do this, follow these steps:
1. Open Outlook and click on File > Account Settings > Data Files to locate the path of your .ost file.
2. Close Outlook and navigate to the .ost file's location, typically found in C:\Users\YourName\AppData\Local\Microsoft\Outlook.
3. Rename or delete the .ost file, such as changing the extension to .bak or .old.
4. Restart your Outlook client, which will create a new .ost file automatically.
By following these steps, you should resolve the error and regain access to your Outlook folders. Remember to always keep a backup of your files before making changes.
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your program wishes to use the class java.util.calendar. your source does not have any import statements in it. when instantiating an instance of the class calendar, your code must say:
To instantiate an instance of the class java.util.Calendar, your code must say new java.util.Calendar(). This will create a new instance of the Calendar class without any import statements.
When instantiating an instance of the java.util.Calendar class, you must use the new keyword followed by the class name. This will create a new instance of the Calendar class without any import statements.
You can also use the Calendar class to set the date and time values of the instance, as well as to add or subtract time from the instance. Additionally, you can use the Calendar class to convert a calendar instance to a different time zone, or to obtain the time in milliseconds since the beginning of the epoch.
The Calendar class also provides a number of methods to format the date and time values of a Calendar instance, including the getTime() and getTimeInMillis() methods.
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Which three statements describe characteristics of permanent memory in a
computer?
A. It loses data when the computer is powered off.
B. It holds a large amount of data.
C. It is slower to access than RAM.
D. It is inexpensive.
Answer:
it's used for further cahce
b
how can you check data on devices connected through an iot network?
Answer: Use a tablet
Explanation: IoT means the "Internet of Things," which describes the network of physical objects.
Internet of Things(IoT) which could be described as a group of interconnected systems or objects which are able to communicate, transmit and exchange data using smart technology and sensors. Data can be checked and monitored on these devices using Dashboards.
Dashboards provides a graphical representation of information about interconnected IoT objects or devices. They are produced using data collected from interconnected objects. Since all objects are interconnected, devices use data which are are stored in storage or memory locations. These data are then used to prepare information displayed on dashboards.Therefore, dashboards provides an interface to view data information about IoT connected devices.
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______________________ increases security by verifying identity based on more than just a password or pin.
Answer:
two-factor authentication
Explanation:
two-factor authentication increases security by verifying identity-based on more than just a password or pin.
Please.. I want to answer quickly.. in computer or in
clear handwriting.. and thank you very much
2. The data below is actually the length of Item 01 of a Kitchen Organizer for its plate rack. Considering the data given in \( \mathrm{cm} \) and with a standard is \( 55+/-5 \mathrm{~cm} \). Do the
Without the actual data provided, it is not possible to determine whether the given data is within the standard range or not. The conclusion depends on comparing the actual data with the specified standard range of
55±5 cm.
The given data is within the standard range for the length of Item 01 of the Kitchen Organizer plate rack.
Explanation:
To determine if the given data is within the standard range, we need to compare it to the specified standard of
55
±
5
c
m
55±5cm.
If the given data falls within the range of
55
±
5
c
m
55±5cm, then it is considered within the standard.
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if i don't convert type to outlines in illustrator, does the viewer need to have the fonts installed? Yes/No
Yes, if you don't convert the type to outlines in Illustrator and the viewer does not have the fonts installed on their computer, the text will not display correctly.
This is because when you create text in Illustrator, it uses the fonts installed on your computer to display the characters. If you send the file to someone who does not have those fonts installed, their computer will substitute a different font, which may not match the original design.
However, if you convert the text to outlines, the font is no longer required and the text will be displayed as a graphic, which can be viewed correctly regardless of the viewer's installed fonts. It's important to note that converting text to outlines can make it more difficult to make edits later, so it's recommended to keep a copy of the original file with the live text intact.
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You’re mapping out the logical relations of a database, and you notice that one of your tables will have a pair of child records for every record created in the parent entity. What type of relationship do these tables have?
A. One-to-many
B. Pair of one-to-many relationships
C. Many-to-Manu
D. One-to-one
The type of relationship that these tables have is (B), Pair of one-to-many relationships.
What is one-to-many relationships?A one-to-many relationship is a type of relationship between two tables in a database where one record in the parent table can have multiple child records in the child table. In this case, one record in the parent table will have a pair of child records in the child table, so the relationship between the two tables is a pair of one-to-many relationships.
For example, a table of employees could have a one-to-many relationship with a table of dependents. Each employee could have multiple dependents, so each record in the employees table would have a pair of child records in the dependents table.
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1. how many records does this file contain? 2. what problem would you encounter if you wanted to produce a listing by city? how would you solve this problem by altering the file structure?
There is not a field for city, only manager's address. In order to get a listing by city, you would have to break up the address into address, city, state, zip, file format.
What is file structure?
A file structure is a combination of data models stored within files. It is also a set of operations for gaining access to data. It allows programs to read, write, and modify data. File structures can also aid in the discovery of data that meets specific criteria. An improvement in file structure can make applications hundreds of times faster.
The primary goal of creating file systems is to minimize the number of disk trips needed to retrieve desired data. It ideally corresponds to obtaining what we require in as few 's database as possible.Although slow, disks provide enormous capacity at a lower cost than memory. They also retain the data stored on them even when turned off. The main driving force behind file structural system is the slow access time of a disk and its enormous, nonvolatile capacity.
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A(n) _____ is an overall orderly arrangement of all the format elements of a print ad. Group of answer choices Format Blueprint Ad draft Layout Outline
A layout is an overall orderly arrangement of all the format elements of a print ad.
The target market, the media, the message, and the budget are some of the components of advertising. By raising brand awareness, boosting sales, and cultivating consumer loyalty, a strategic advertising campaign can aid a company in achieving its marketing goals.
A plan, organization, general framework, or blueprint for advertising copy is called a layout. It systematically arranges headings, subheadings, slogans, images, identification markings, text body, etc.
Therefore, Option (d) is correct.
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______ is computer software prepackaged software a good career path
yes, Computer software, including prepackaged software, can be a good career path for those who are interested in technology and have strong programming and problem-solving skills.
Prepackaged software, also known as commercial off-the-shelf (COTS) software, is software that a third-party vendor develops and distributes for use by multiple customers. This software is widely used in a variety of industries and can range from simple applications to complex enterprise systems.
Roles in prepackaged software include software engineer, software developer, software architect, quality assurance engineer, project manager, and many others. These positions necessitate a solid technical background in programming languages, databases, and software development methodologies.
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Which of the following statements are true about cross-platform development? Select 3 options.
Hybrid apps are cross-platform and provide access to many hardware features.
Web apps are not cross-platform, unless they are being run on a smartphone.
Native apps are cross-platform applications, where one version of the app runs on all devices.
Application programming interfaces are often used to make cross-platform development easier.
Cross-platform development allows programmers to create one version of an app that runs on many
different platforms.
Answer:
- Application programming interfaces are often used to make cross-platform development easier.
-Hybrid apps are cross-platform and provide access to many hardware features.
-Cross-platform development allows programmers to create one version of an app that runs on many different platforms.
Explanation:
The statements that are correct about "cross-development platform" would be:
A). Hybrid apps are cross-platform and provide access to many hardware features.
D). Application programming interfaces are often used to make cross-platform development easier.
E). Cross-platform development allows programmers to create one version of an app that runs on many different platforms.
What is a cross-development platform?The Cross-Development platform is described as the process of development of application software that carries the ability to function on various operating systems.
The above statements correctly state that these applications offer access to multiple characteristics of the hardware and work on a number of platforms.
The applications are prepared to allow its access on distinct devices and it helps in making on the application that will work on all platforms.
Thus, options A, D, and E are the correct answers.
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What does this mean? it is coming after i ask a question
Don't use such phrases here, not cool! It hurts our feelings :(
Answer:
To my own opinion I think it means that when you're answering a question here in brainly I think they are referring that your message is rude but sometimes you are not rude but I don't know. Maybe it could be some difficult technical problems.
a collection of abstract classes defining an application in skeletal form is called a(n) .
A collection of abstract classes defining an application in skeletal form is called a framework. A framework is a collection of abstract classes that define an application in skeletal form. The main answer is that a framework provides a skeleton or blueprint that defines the overall structure and functionality of the application, while allowing developers to customize and extend specific parts as needed.
Abstract classes: A framework consists of a collection of abstract classes.
Skeletal form: These abstract classes define an application in skeletal form.
Blueprint: The abstract classes provide a skeleton or blueprint that defines the overall structure and functionality of the application.
Customization: Developers can customize and extend specific parts of the application as needed.
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One part of a development team has completed an algorithm. Why is it important to share it with others on the team? Choose all that apply. If it is easy to understand, no one will dispute what is included in the algorithm. It will give everyone else an opportunity to comment on the process described in the algorithm. It will serve as the starting point for all future activity. It communicates the consecutive instructions of the solution.
Answer: B,C,D
Explanation:
Answer:
the answer is B,C,D
Explanation: