A' is the complement of A, which means it contains all elements in the universal set that are not in A. The elements in set A are 4, 5, and 6. The universal set contains 1, 2, 3, 4, 5, 6, and 7. Therefore, A' = {1, 2, 3, 7}.
B' is the complement of B, which means it contains all elements in the universal set that are not in B. The elements in B are 2, 4, and 5. The universal set contains 1, 2, 3, 4, 5, 6, and 7. Therefore, B' = {1, 3, 6, 7}.
The intersection of A' and B' (A' ∩ B') consists of all elements that are in both A' and B'. A' = {1, 2, 3, 7} and B' = {1, 3, 6, 7}. Therefore, A' ∩ B' = {1, 3, 7}.