Answer
a) {$2,4$}
b) {$1,2,3,4,5,6,7,8,9$}
c) {$2,4$}
Work Step by Step
a) This question is asking for numbers in set A AND set B. We see that these numbers are 2 and 4.
b) This question is asking for numbers in set B OR set C. We see that these numbers are 1,2,3,4,5,6,7,8,9.
c) Our answer to part A was 2,4 and our answer to part B was 1,2,3,4,5,6,7,8,9. This question asks which numbers are in both of these sets. We see that the answer is 2 and 4.