You are tasked with designing the arithmetic unit of the following ALU. The ALU operations are: A+B .A-B . A+ 1 A-1 A) If you had access to a Full added, what is the most simplified expression for the B-logic (The block that changes B before connecting to the full adder)? This block should have 3 inputs S1 SO B. and Y is the output that gets connected to the Full adder. B) What is the simplified expression for the block connecting S1 SO B to Cin of the Full Adder. A) Y = S1' SO B+ SO B' + S1 SO. B) Cin S1 SO + S1 SO' A) Y = S1' 50' B + SO B' + S1 SO B) Cin S1 'SO + S1 SO' A) Y = S1 SO'B + SO B' + S1 SO B) Cin S1 'SO + S1 SO' A) Y = S1' SO'B + SO B + S1 SO B) Cin S1 'SO + S1 SO'