12. For each of the functions f(N) give its order (Big O). Choose your answer from the following list: O(N2), O(N1/2), O(N1/4), O(log3 N), O(N), O(N2 log N), O(N5), O(2N), O(N3), O(N8), O(log4 N), O(N log3 N), O(N2 log2 N) O(log N), O(1), O(N4), O(NN), O(N6), O(N log2 N), O(log log N). a. f(N) = N1/2 + log3 N b. f(N) = 100 log N + N1/4 c. f(N) = N2 log N2 + 2 N log2 N d. f(N) = (N(100N + 5 + N3))2 e. f(N) = log2(2N) f. f(N) = N2 (log N3 log N) + N2 g. f(N) = (N log N + 2N)2