Let S = {1, 2, 3, ..., 18, 19, 20} be the universal set, Let sets
A and B be subsets of S, where:
Set A = {2, 3, 4, 6, 8, 10, 11, 14, 17, 18, 19)
Set B {1, 3, 5, 6, 8, 12, 13, 17, 18}
Determine the following:
n(A) -
n(ā)
n(B)
n(AuB)
n(AuB )