Find each union or intersection. Let A = {2, 3, 5}, B = {5, 6, 7, 9}, C = {x/x is an odd
number less than 10}, and D = {x/x is an even number less than 10}.
1. A U B = {x : x ∈ A or x ∈ B}
2. A U C = {x : x ∈ A or x ∈ C}
3. A U D = {x : x ∈ A or x ∈ D}
4. B U C = {x : x ∈ B or x ∈ C}
5. B U D = {x : x ∈ B or x ∈ D}
6. C U D = {x : x ∈ C or x ∈ D}
7. A ∩ B = 5 {x : x ∉ A or x ∉ B}
8. A ∩ C = 3,5 {x : x ∉ A or x ∉ C}
9. A ∩ D = 2 {x : x ∉ A or x ∉ D}
10. B ∩ C = 5,7,9 {x : x ∉ B or x ∉ C}

11. B ∩ D = 6 {x : x ∉ B or x ∉ D}

12. C ∩ D = {x : x ∉ C or x ∉ D}