Question $3$: Review of Combinational Circuits

You are tasked with implementing an arithmetic circuit that computes $W=x-2Y-1,$ where $x$ and $Y$ are $3-$

bit signed integers represented in $2\text{'}$s complement, using standard MSI components.

Provide two implementations for this arithmetic circuit:

$($a$)$ One that shows the implementation without considering overflow.

$($b$)$ One that shows the implementation while avoiding overflow.