If A = {3, 5, 7, 9, 11}, B = {7, 9, 11, 13}, C = {11, 13, 15} and D = {15, 17}; find
(i)  A ∩ B
(ii)  B ∩ C
(iii)  A ∩ C ∩ B
(iv)  A ∩ C
(v)   B ∩ D
(vi)  A ∩ (B ∩ C)
(vii) A ∩ D
(viii) A ∩ (B ∩ D)
(ix)  (A ∩ B) ∩ (B ∪ C)
(x)  (A ∪ B) ∩ (B ∪ C)

(i) A ∩ B = {7, 9, 11}
(ii) B ∩ C = {11, 13}
(iii) A ∩ C ∩ B = {11}
(iv) A ∩ C = {11}
(v) B ∩ D = {}
(vi) A ∩ (B ∩ C) = {11}
(vii) A ∩ D = {}
(viii) A ∩ (B ∩ D) = {3, 5, 7, 9, 11} ∩ {} = {}
(ix)   (A ∩ B) ∩ (B ∪ C) = {7, 9, 11} ∩ {7, 9, 11, 13, 15} = {7, 9, 11}
(x)    (A ∪ B) ∩ (B ∪ C) = {3, 5, 7, 9, 11, 13} ∩ {7, 9, 11, 13, 15}
                                 = {7, 9, 11, 13}