Auniversal set u consists of 26 elements. if sets a, b, and c are proper subsets of u and n(u)equals26, n(a intersect b)equalsn(a intersect c)equalsn(b intersect c)equals11, n(a intersect b intersect c)equals5, and n(a union b union c)equals23, determine each of the following. a) n(a union b) b) n left parenthesis upper a prime union upper c right parenthesis c) n left parenthesis upper a intersect upper b right parenthesis prime