⟩ For the case of Mixed Columns and Inverse Mixed Columns, is it true that b(x) = a-1(x)mod(x4 + 1) where a(x) = {03}x3 + {01}x2 + {01}x + {02} and b(x) = {0B}x3 + {0D}x2 + {09}x + {0E} a) True b) False. The expression for a(x) is wrong. c) False. The expression for b(x) is wrong. d) False. Both a(x) and b(x) are faulty.