Problem with intersection and unions pls help

Question

Let A, B, and C be sets in a universal set U we are given n(U)=47 n(A)=21 n(B)=19 n(C)=15 n(A intersection B)=10 n(A intersection C)=6 n(B intersection C)=6 n(A intersection B intersection C complement)=6 find the following values n((A union B union C) complement) n(A complement intersects B complement intersects C)

Answer 1

So there are 6 in all 3 sets

4 in A or B but not C

0 in A or C but not B

0 in B and C but not A

11 in A only

9 in B only

9 in C only

8 in NONE of the three sets

n ( ( A U b U c) ') = 8

n ( (A' intersect B' intersect C) ) = 9