Question: Design a combinational circuit that adds two 4-bit signed numbers and generates an output of 1 if the 4-bit result is zero; the output is

Design a combinational circuit that adds two 4-bit signed numbers and generates an output of 1 if the 4-bit result is zero; the output is 0 if the 4-bit result is nonzero. Draw a logic circuit using the block diagram of a 4-bit binary adder as the building block and a minimum number of logic gates.

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