If A and B are two sets such that n(Ac) = 32, n (Bc) = 11, n (A∩ B) = 6, and U is the Universal set which is the union of A and B, then which of the following is correct?
1) n (A∪ B) = 22
2) n (A∪ B) = 43
3) n (A∪ B) = 49
4) n (A∪ B) = 37