Fill in the blanks to make each of the following a true statement:
(i) A ∪ A’ = . . . (ii) ϕ’ ∩ A = . . .
(iii) A ∩ A’ = . . . (iv) U’ ∩ A = . . .
(i) A ⋃ A’ = U
(ii) ϕ’ ⋂ A = U ⋂ A = A (as ϕ’ = U)
(iii) A ⋂ A’ = ϕ
(iv) U’ ⋂ A = ϕ ⋂ A = ϕ (as U’ = ϕ)