I need help with the sumR method. The instructions are in the java doc comment. The instructions state to create this using recursive and iterative implementations.

Thank you!

public class Summation { /** Returns the sum of 1..n for n > 0. */ public static int sumI(int n) { int sum = 1; for (int i = 2; i <= n; i++) { sum = sum + i; } return sum; } /** Returns the sum of 1..n */ public static int sumR(int n) { int sum = 1; for (int i = 0; i <= n; i++) { sum = sum + i; } return sum; } /** Drives execution. */ public static void main(String[] args) { for (int i = 1; i < 10; i++) { int s1 = sumI(i); int s2 = sumR(i); System.out.println(i + ": " + s1 + ", " + s2); } int sum = sumI(5); sum = sumR(5); System.out.println(sum); } }