WILL LEAVE GOOD RATING. PLEASE HELP

THANK YOU!!

( JAVA) Can you modify this program to

• a) a method readGrades that receives one int parameter (how many grades to read), and returns an array of integers representing grades read in from the user.

• b) a method computeSum that receives an array of integers (grades) and an int (n), and computes and returns the sum of the first n integers in the array.

• c) a method computeAverage that receives an array of integers (grades) and an int (n), and computes and returns a double: the average of the first n integers in the array. Have your computeAverage method call your computeSum method.

• d) a method howManyCloseToAvg that receives 3 parameters: an array of integers (grades), a double (average), and an int (k), and computes and returns how many grades are within k of the average, e.g. if the array is {70, 80, 90, 100}, the average is 85, and k is 5, there are 2 grades within 5 of the average: 80 and 90. so the method should return 2.

• e) a method convertToLetterGrade that receives a double (average) and returns a char (the equivalent letter grade) as follows: Note: the range [x,y) means: between x and y, including x, excluding y. In Java, logical AND is &&, and logical OR is || (two consecutive vertical bars).

• average	letter grade
  [90,100]	A
  [80,90)	B
  [70,80)	C
  [60,70)	D
  [0,60)	F

ORIGINAL PROGRAM

import java.util.Scanner; // Import the Scanner class

public class ComputationUpdate { public static void main (String[] args) { final int NUM_OF_GRADES = 3; int grade1, grade2, grade3; int sum; double average; // Create a Scanner object Scanner myObj = new Scanner(System.in); grade1 = myObj.nextInt(); grade2 = myObj.nextInt(); grade3 = myObj.nextInt(); sum = grade1 + grade2 + grade3; average = (double)sum / NUM_OF_GRADES; //Print the sum and average System.out.println("The sum is "+sum); System.out.println("The average is "+average); } }