Problem A

Design a combinational circuit with inputs a, b, c, d and outputs w, x, y, z. Assume that the inputs a, b, c, d represent a 4-bit signed number (2s complement). The output is also a signed number in 2s complement which is 7 greater than the input if the input is less than 2, and is 3 less than the input if the input is greater than or equal to 2.