Complete the following main program to calculate and print the sum of even numbers in the third and fourth columns of the array arr ( Assume that arr is already filled with integers so DO NOT fill it up)

(note: also assume that R > 5 and C > 5 are defined as constants at the top of the program)

int main()

{

int arr[R][C];

// only fill the code needed here

return 0;

}