patulong po

Consider the following sets:
U = {g, r, e, a, t, n, s}, A = {g, a, s}, B = {r, e, s, t}, & C = {e, a, t}.
Find
1. A ∪ B =
2. A ∩ C =
3. A – B =
4. A´ =
5. C ∪ (A ∩ B) =
6. The number of subsets of B is=​