Could you please give an explanation for these too, Thank you.

For each of the following, give the big-oh runtime in terms of n (if applicable) (not i). (a) Suppose bar(n) is an O(log n) function. Then, using big-oh notation, what is the runtime of the following function? void foo(int n) int i; for (i = 0; i 0) i = i / 2; (c) Suppose bar(n) is an O(n) function. Then, using big-oh notation, what is the runtime of the following function? void foo(int n) int i = n; while (i > 0) bar(n); i = i / 2<>