Q$1)$ An arithmetic and logic unit $($ALU$)$ performs integer and logic operations. Implement $($draw a minimized logic circuit$)$ the logic of a simple ALU that performs $2-$bit addition and subtraction. Assume the operands are $A_1{A}_0$ and $B_1{B}_0,$ and the output is $C_1{C}_0.$ The control signal Op is only one bit, which selects addition or subtraction. Two ways to solve this. $($a$)$ Use $2$ bit adder $($half adder $+$ full adder$)$ with inputs to it being modified based on Op signal, or $($b$)$ start from a truth table. Then you may have to develop a truth table and use $K$ maps for $5$ variables leading to a large circuit. See next page for help. Recall that subtraction is done with adding after making the subtrahend negative $(2\text{'}$s complement$)$ regardless of whether arguments are signed or unsigned.