Input Xi and Yi of each Full Adder circuit in an arithmetic circuit has the digital logic specified by the following Boolean functions: Xi =Ai Yi = B*iS + BiCin*
Where S is a selection variable, and Cin is the input carry, and Ai and Bi are the input data stage I .
a) Draw the logic diagram of the four-bit arithmetic circuit
b) Determine the four arithmetic operations performed when S and Cin are equal to : 00, 01, 10, 11