in the previous task we were asked to help get the square of 5 and the answer was calling the square method in the main method System.out.println(sqr(5)); so I tried the same logic here and tried to call the sum method the same way...I put System.out.println(sum(2, 2)); why doesn't this work for me? it is in same format as in the previous example ....why is the answer sum(2, 2); and why is the previous question public static int while this questions method is public static void