Question 197927
Given U = {l, m, n, o, p, q, r, s, t, u, v, w}, A = {l, o, p, q, s, t}, B = {n, o, r, s, v, w}, 
and C = {l, m, n, q, r, t}, find (A′ U C′) ∩ B ′. 

A, U, C's intersect with B (n, o, r, s, v, w)