Question 4: (22.0 Points; 12.0+ 10.0) 1. In the following figure of adder-subtractor circuit with values for data inputs A and B and mode input M. FA FA FA In each case, determine the values of the sum outputs S. the carry C, and overflow V. M B 0110 0111 1000 1100 Ans 0 2. Using active low outputs 2-to-4 decoder and external gate(s), design the combinational circuit defined by the following Boolean function: F(x,y,z) = (x'ya)(x + z'(x' + x) Ans: K-Map F = 2 yz Combinational Circuit