Question: Question 1. Consider the below schematic of a 4-bit binary adder-subtractor. Consider two 4- bit sequences A (A3 A2 A1 A0) = 1001 and B

Question 1. Consider the below schematic of a 4-bit binary adder-subtractor.

Question 1. Consider the below schematic of a 4-bit binary adder-subtractor. Consider two 4- bit sequences A (A3 A2 A1 A0) = 1001 and B (B3 B2 B1 BO) = 0010. Study the schematic and explain in detail how the subtraction process (A-B) happens. Proof the result and comment on it. (15 points) B3 B2 A2 B1 A1 BO -K C2 C1 CO Full Adderkt Full Adder Full Adder Full Adder Cin Cout S3 S2 s1 SO Figure 1. 4-bit binary adder-subtractor

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