Add, Subtract Here complete the two add and subtraction functions, imatrix* subtract(imatrix* m1, imatrix* m2, imatrix* add(imatrix* m1, imatrix* m2. These two functions take two imatrix and add/subtract them from each other. The result is written to a file and can be observed. To blend images together, try scaling them before adding or subtracting them. Complete the code to add 2 matrices in C.
imatrix* add(imatrix* m1, imatrix* m2){
// YOUR CODE HERE
return NULL;
}