in java Question #1: calculate Even Sum (50 points): Please fill the function in

Question

in java

Question #1: calculate Even Sum (50 points): Please fill the function int calEvenSum (int n) to calculate the sum of all even numbers between 1 and n (including). ( Hint: Even number is evenly divisible by two.)

           For example,

           Input:        n = 4                        Return:   6 (Because 2 + 4 = 6)                             n = 3                        Return:   2

Question #2: checkMagicSquare (50 points): Please write the function boolean checkMagicSquare (int [][]) is to check if the given square matrix is a magic square. (Note: For a square matrix, if the sum of all the elements on main diagonal and the sum of all elements on anti-diagonal are the same, this matrix is defined as a magic square.)

         For example

          Input:    arr = {1, 4

                                  2, 6}

         Return: False (Because 1 + 6 2 + 4)

          Input:    arr = {1, 4, 4

                                  2, 1, 5                                   3, 5, 6}

         Return: True (Because 1 + 1 + 6 = 4 + 1 + 3)

Explanation / Answer

1.

int calEvenSum(int no)

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