4. Let the universal set be U = {x : x ∈ W and x < 9}. Also, A = {factors of 6} and B = {factors of 8}. Find the following sets.
(i) A'
(ii) B'
(iii) A' ∩ B'
(iv) A' ∪ B'
Also, verify the following.
(a) (A ∪ B)' = A' ∩ B'
(b) (A ∩ B)' = A' ∪ B'
(c) A ∪ (B ∩ C) = (A ∪ B) ∩ (A ∪ C)
(d) A ∩ (B ∪ C) = (A ∩ B) ∪ (A ∩ C)
