Implement using java programming language.

1)a. Write a tail- or a non-tail recursive method with the header: public static int sumSqrN(int n) that returns the sum of squares of the first n integers:

n² + (n 1)² + (n 2)² + . . . + 1²

Note: If you write a tail-recursive method; use a recursive helper method.

Do not use the formula n(n + 1)(2n + 1)/6 or any other summation formula in

your solution.

Do not use instance or static variables in your solution.

Do not use loops in your solution.

2. Write a test program to test sumSqr method.

Sample program run:

///SumSqrN.java///

import java.util.Scanner;

public class SumSqrN{ public static void main(String args []){ //test method to be implemented by you } public static int sumSqrN(int n){ //to be implemented by you } }

Please need it soon!!Help!!