Write T(n) and big-O expressions for the following loops (explain how the result came about):

A) for (int i = 0; i < n; i++) for

(int j = 0; j < i * i; j++)

cout << j << endl;

B) for (int i = n; i >= 0; i -= 2)

cout << i << endl;

C) for (int i = 0; i < n; i++)

for (int j = i; j > 0; j /= 2)

cout << j << endl;