In the following, state whether A = B or not: (i) A = {a, b, c, d}, B = {d, c, b, a} (ii) A = {4, 8, 12, 16}, B = {8, 4, 16, 18} (iii) A = {2, 4, 6, 8, 10}, B = {x : x is positive even integer and x ≤ 10} (iv) A = {x : x is a multiple of 10}, B = {10, 15, 20, 25, 30, ...}