6. Cartesian Product of B x B: B X B = {(a, a), (a, b), (b, a), (b, b) } 7. Cartesian Product of C x C: C x C = {(a, a), (a, b), (a, c), (b, a), (b, b), (b, c), (c, a), (c, b), (c, c) }