Question 866132
1. {2, 3, 7} ∩ {3, 7, 8} ={3,7}
2. No operation noted
3. {2,4,6,8} ∪ {9}={2,4,6,8,9}
4. (B ∩ C)={5}
A ∪ (B ∩ C)={1,2,3,4,5}