Heyhey, can someone please help me with this question?

The universal set, U and the two sets A and B cantained within are such that:

-n(AnB)=6

-n(A)= 27

-n(B)=46

-n(U)=70

determine 1) n(AuB) 2) n((AuB)')

I have so far found out that A,B and AnB don't add up to 70, how do you work out the actual number of A and B?

thank you xxx