A combinational circuit has three inputs, x, y, and z, and

three outputs, A, B, and C. When the binary input is 0, 1, 2, or 3, the 

binary output is one greater than the input. When the binary input is 4, 5, 

6, or 7, the output is the two’s complement of input.

(a) Design the combinational circuit by finding the circuit’struth table, 

Boolean expression and the logic diagram.

(b) Write the Verilog HDL code for the above circuit using gate level model .