Eight(8) errors have occurred while running the following methods. Correct the error to generate the following output. Explain how to correct it. Note: You should not change anything on line # 21. (15points) 13 public static void sum(a, b) { return a+b; 14 15 16 17 18 19 20 21 22 } public static void main(String[] args) { a = 1; b = 2; result-sum(int a, int b); System.out.println(result); } // output 3