If A = {0, 1, 2, 3, 4, 5} , B = {2, 4, 6 } ,find i) AUB ii) A ∩ B iii) A – B iv) B – A , Also verify that

a) n(A – B) = n(AUB) – n(B) = n(A) – n( A ∩ B )
b) n(AUB) = n(A – B) + n(B – A) + n( A ∩ B )