4. What does this function return? Which principle does it illustrate?

Note:- Study this program and follow the given instruction and type execute the code and also give output for this java program as soon as possible. INSTRUCTIONS:-  Modify example four to read integer values from the keyboard, store them into a 15 element array, then write the array into a file named userin.txt Write a program to create two files with the names file4.txt and file4a.txt     two 10 element int arrays with the names arrfile4 and arrfile4a; these arrays are to have different values     write the contents of arrfile4 to file4.txt     write the contents of arrfile4a to file4a.txt exampleFour In the while loop, this program reads fileLoop.txt until all items are read; Each item in the file is stored into an array   package storeintoarr;   import java.util.Scanner; import java.io.*;   public class Storeintoarr {           public static void main(String[] args) throws IOException     {        File loopfile = new File("fileLoop.txt");              Scanner getAll = new…

6. Write an assignment statement that might be used to implement the equation below: (use the pow(a,b) function)    y = 4x⁴+ 2x² + 1