Explanation:
We have to list the elements present in each set.
A = {multiples of 3 between 20 and 32}
A = {21, 24, 27, 30}
B = {odd numbers between 20 and 32}
B = {21, 23, 25, 27, 29}
C = {even numbers between 20 and 32}
C = {20, 22, 24, 26, 28, 30, 32}
a) list the members of A ∪ B
This means to select the elements of sets A and B
A ∪ B = {21, 23, 24, 25, 27, 29, 30}
b) list the members of A ∩ C
This means to only pick the elements that are present in both A and B
A ∩ C = {24, 30}