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 $10$ and $10,$ and the output is $10.$ 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 $(2$s

complement$)$ regardless of whether arguments are signed or unsigned.