Task #3 Writing Output to a File1. Copy the files StatsDemo.java (see Code Listing 4.2) and Numbers.txt from theStudent Files or as directed by your instructor.2. First we will write output to a file:a. Create a FileWriter object passing it the filename Results.txt (Don’tforget the needed import statement).b. Create a PrintWriter object passing it the FileWriter object.c. Since you are using a FileWriter object, add a throws clause to themain method header.d. Print the mean and standard deviation to the output file using a threedecimal format, labeling each.e. Close the output file.3. Compile, debug, and run. You will need to type in the filename Numbers.txt. Youshould get no output to the console, but running the program will create a filecalled Results.txt with your output. The output you should get at this point is:mean = 0.000, standard deviation = 0.000. This is not the correct mean orstandard deviation for the data, but we will fix this in the next tasks.Task #4 Calculating the Mean1. Now we need to add lines to allow us to read from the input file and calculate themean.a. Create a FileReader object passing it the filename.b. Create a BufferedReader object passing it the FileReader object.2. Write a priming read to read the first line of the file.3. Write a loop that continues until you are at the end of the file.4. The body of the loop will:a. convert the line into a double value and add the value to the accumulatorb. increment the counterc. read a new line from the file5. When the program exits the loop close the input file.6. Calculate and store the mean. The mean is calculated by dividing the accumulatorby the counter.7. Compile, debug, and run. You should now get a mean of 77.444, but the standarddeviation will still be 0.000.Task #5 Calculating the Standard Deviation1. We need to reconnect to the file so we can start reading from the top again.a. Create a FileReader object passing it the filename.b. Create a BufferedReader object passing it the FileReader object.2. Reinitialize the sum and count to 0.3. Write a priming read to read the first line of the file.4. Write a loop that continues until you are at the end of the file.5. The body of the loop will:a. convert the line into a double value and subtract the mean, store the resultin differenceb. add the square of the difference to the accumulatorc. increment the counterd. read a newline from the file.6. When the program exits the loop close the input file.7. The variance is calculated by dividing the accumulator (sum of the squares of thedifference) by the counter. Calculate the standard deviation by taking the squareroot of the variance (Use the Math.sqrt method to take the square root).8. Compile, debug, and run. You should get a mean of 77.444 and standarddeviation of 10.021.Code Listing 4.2 (StatsDemo.java)import java.util.Scanner;// TASK #3 Add the file I/O import statement here/**This class reads numbers from a file, calculates themean and standard deviation, and writes the resultsto a file.*/public class StatsDemo{// TASK #3 Add the throws clausepublic static void main(String[] args){double sum = 0; // The sum of the numbersint count = 0; // The number of numbers addeddouble mean = 0; // The average of the numbersdouble stdDev = 0; // The standard deviationString line; // To hold a line from the filedouble difference; // The value and mean difference// Create an object of type ScannerScanner keyboard = new Scanner (System.in);String filename; // The user input file name// Prompt the user and read in the file nameSystem.out.println("This program calculates " +"statistics on a file " +"containing a series of numbers");System.out.print("Enter the file name: ");filename = keyboard.nextLine();// ADD LINES FOR TASK #4 HERE// Create a FileReader object passing it the filename// Create a BufferedReader object passing FileReader// object// Perform a priming read to read the first line of// the file// Loop until you are at the end of the file// Convert the line to a double value and add the// value to sum// Increment the counter// Read a new line from the file// Close the input file// Store the calculated mean// ADD LINES FOR TASK #5 HERE// Reconnect FileReader object passing it the// filename// Reconnect BufferedReader object passing// FileReader object// Reinitialize the sum of the numbers// Reinitialize the number of numbers added// Perform a priming read to read the first line of// the file// Loop until you are at the end of the file// Convert the line into a double value and// subtract the mean// Add the square of the difference to the sum// Increment the counter// Read a new line from the file// Close the input file// Store the calculated standard deviation// ADD LINES FOR TASK #3 HERE// Create a FileWriter object using "Results.txt"// Create a PrintWriter object passing the// FileWriter object// Print the results to the output file// Close the output file}}

Question

Task #3 Writing Output to a File1. Copy the files StatsDemo.java (see Code Listing 4.2) and Numbers.txt from theStudent Files or as directed by your instructor.2. First we will write output to a file:a. Create a FileWriter object passing it the filename Results.txt (Don’tforget the needed import statement).b. Create a PrintWriter object passing it the FileWriter object.c. Since you are using a FileWriter object, add a throws clause to themain method header.d. Print the mean and standard deviation to the output file using a threedecimal format, labeling each.e. Close the output file.3. Compile, debug, and run. You will need to type in the filename Numbers.txt. Youshould get no output to the console, but running the program will create a filecalled Results.txt with your output. The output you should get at this point is:mean = 0.000, standard deviation = 0.000. This is not the correct mean orstandard deviation for the data, but we will fix this in the next tasks.Task #4 Calculating the Mean1. Now we need to add lines to allow us to read from the input file and calculate themean.a. Create a FileReader object passing it the filename.b. Create a BufferedReader object passing it the FileReader object.2. Write a priming read to read the first line of the file.3. Write a loop that continues until you are at the end of the file.4. The body of the loop will:a. convert the line into a double value and add the value to the accumulatorb. increment the counterc. read a new line from the file5. When the program exits the loop close the input file.6. Calculate and store the mean. The mean is calculated by dividing the accumulatorby the counter.7. Compile, debug, and run. You should now get a mean of 77.444, but the standarddeviation will still be 0.000.Task #5 Calculating the Standard Deviation1. We need to reconnect to the file so we can start reading from the top again.a. Create a FileReader object passing it the filename.b. Create a BufferedReader object passing it the FileReader object.2. Reinitialize the sum and count to 0.3. Write a priming read to read the first line of the file.4. Write a loop that continues until you are at the end of the file.5. The body of the loop will:a. convert the line into a double value and subtract the mean, store the resultin differenceb. add the square of the difference to the accumulatorc. increment the counterd. read a newline from the file.6. When the program exits the loop close the input file.7. The variance is calculated by dividing the accumulator (sum of the squares of thedifference) by the counter. Calculate the standard deviation by taking the squareroot of the variance (Use the Math.sqrt method to take the square root).8. Compile, debug, and run. You should get a mean of 77.444 and standarddeviation of 10.021.Code Listing 4.2 (StatsDemo.java)import java.util.Scanner;// TASK #3 Add the file I/O import statement here/**This class reads numbers from a file, calculates themean and standard deviation, and writes the resultsto a file.*/public class StatsDemo{// TASK #3 Add the throws clausepublic static void main(String[] args){double sum = 0; // The sum of the numbersint count = 0; // The number of numbers addeddouble mean = 0; // The average of the numbersdouble stdDev = 0; // The standard deviationString line; // To hold a line from the filedouble difference; // The value and mean difference// Create an object of type ScannerScanner keyboard = new Scanner (System.in);String filename; // The user input file name// Prompt the user and read in the file nameSystem.out.println(&#34;This program calculates &#34; +&#34;statistics on a file &#34; +&#34;containing a series of numbers&#34;);System.out.print(&#34;Enter the file name: &#34;);filename = keyboard.nextLine();// ADD LINES FOR TASK #4 HERE// Create a FileReader object passing it the filename// Create a BufferedReader object passing FileReader// object// Perform a priming read to read the first line of// the file// Loop until you are at the end of the file// Convert the line to a double value and add the// value to sum// Increment the counter// Read a new line from the file// Close the input file// Store the calculated mean// ADD LINES FOR TASK #5 HERE// Reconnect FileReader object passing it the// filename// Reconnect BufferedReader object passing// FileReader object// Reinitialize the sum of the numbers// Reinitialize the number of numbers added// Perform a priming read to read the first line of// the file// Loop until you are at the end of the file// Convert the line into a double value and// subtract the mean// Add the square of the difference to the sum// Increment the counter// Read a new line from the file// Close the input file// Store the calculated standard deviation// ADD LINES FOR TASK #3 HERE// Create a FileWriter object using &#34;Results.txt&#34;// Create a PrintWriter object passing the// FileWriter object// Print the results to the output file// Close the output file}}

Accepted Answer

The code uses the Scanner object to read the lines from the file and computes the mean and the…