& 0:29 Q Assignment 1.pdf Assignment1 A four-bit adder-subtractor circuit is shown in the Figure below. The mode input M controls the operation. When M-0, the circuit is an adder, and when M=1, the circuit becomes a subtractor B 4 8, 1. 8 1 B 4. M ' C . FA FA FA M S 5 S The circuit has the following values for mode input M and data inputs A and B. In each case, determine the values of the four SUM Outputs (S0, S1, S2, S3) and the carry C. M A B 0 0111 0110 1001 0 (b) (c) (d) 1 1000 1100 0101 1 1 1000 1010 0001 (e) 0000