Let U=1,2,3,4,5,6,7,8,a,b,c,d,e. If A=1,2,a,e and B=1,2,3,4,a,b,c, find the following:
(a) n(A∩C)
(b) n(A∩B∩C)
(c) n(A∪B∩C)
(d) n(A∩C∩B∩C)