Let S = {1, 2, 3, ..., 18, 19, 20} be the universal set. Let sets A and B be subsets of S, where: Set A = {3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 18} Set B = {4, 5, 6, 7, 9, 10, 11, 12, 15, 16, 17, 19, 20} Determine the following: n(A) = = 12 PO B n(A)= = 13 n(B) = = 8 n(ANB) = 7 n(AUB) = 18 O