Problem 5: What is the worst-case complexity of the each of the following code fragments? (5 points each)

 (a) for (i = 0; i < N; i++) { // code } for (j = 0; j < M; j++) { // code } (b) for (i = 0; i < N; i++) { for (j = 0; j < N; j++) { // code }} for (k = 0; k < N; k++) { // more code } (c) for (i = 0; i < N; i++) { for (j = N; j > i; j--) { // code }}