Disign a system that calculates the difference between two signed 8-bit values A and B and return that difference D (which is an 8-bits output). For example; A=8, B=2, D=6; A= -(2), B=7, D=9; A= -(1), B= -(3), D=2. Ignore any overflow issues. You may use any of the following components: gates, 2to4 and/ or 3to8 decoders, 2x1 and/or 4x1 Muxes, 8-bits adders with carry-in and carry-out, 8bits signed comparator.