What is the time complexity of adding three matrices of size NXN cell-by-cell? a. O(N) b. O(N^2) c. O(N^3) d. None of these

1.What is the time complexity of adding three matrices of size NXN cell-by-cell?

a. O(N)
b. O(N^2)
c. O(N^3)
d. None of these


Answer:b;