Let U = {people at Mount College},
A = {students at Mount College}, B = {teachers at Mount College},
C = {people at Mount College who are older than 35}, and
D = {people at Mount College who are younger than 35}.
1. A ∩ D
2. B ∩ C
3. A ∩ B
4. B ∪ C
5. A ∪ C 
6. (A ∩ D)
7. D'
8. D ∩ U