Part B. Mirror Register Design a 4-bit mirror register that has two inputs, E to enable the circuit, and M to enact the mirroring of the register contents. A mirror transformation switches the bit values in the register so that the higher order bits are exchanged, or swapped, with the lower order bits. In the case of a 4-bit register, bit_0 and bit_3 are swapped, and bit_1 and bit_2 are swapped. When E=0 the circuit is disabled. When E=1 and M=0, the contents are left unchanged. When E=1 and M=1 the contents are mirrored. You must express your answer as a logic diagram using D flip-flops.