q5 for two numbers aa3a2a1a0 and bb3b2b1bo use a few full adders some
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Q5. For two numbers A=a3a2a1a0 and B=b3b2b1bo, use a few full adders, some gates, and one control wire (=1 means subtraction), to implement a circuit that can do both addition
and subtraction. Please construct a component to generate overflow too.