Class 17 B4 3 1.(30 points) Given a 5-bit adder that will calculate the sum of the two 2's complement binary numbers A-10100 and B-10001, with Cin-0, and assuming that the sum is represented as S S S2S,So and the carry is represented as CaC C.C,Ca, identify the values of the following bits: a. S2 b. C c. Cs d. S e. The sum in decimal. f. The presence of overflow. 2. (22 points) Given the circuit below with 5-bit input A and 5-bit input B, modify the circuit so that it produces S -B-A. You may add up to five gates and reorganize wires as necessary, but you cannot use XOR gates