Part A: $4-$bit Multiplexer RTL Design

Implement a $4-$bit multiplexer $2-$to$-1$ RTL model.

Use a select input to determine the input selection for the multiplexer. If the select is set to

$0,$ the multiplexer should pass input D$0$ and if select is set to $1,D1$ should be passed.

Additionally, include an "enable" input to control the multiplexer. If enable is $0$ output $Y$

should be $"0"$ else the output will be assigned with input based on select value.

Write the generate stimuli code according to your preference, and observe the waveforms

aligning with the specified delays in the Test bench$\mathrm{.}1.$implement a $4-$bit multiplexer $2-$to$-1$ RTL model.

$2.$ Use a select input to determine the input selection for the multiplexer. If the select is set to

$0,$ the multiplexer should pass input D$0$ and if select is set to $1,$ D$1$ should be passed.

$3.$ Additionally, include an $$enable$$ input to control the multiplexer. If enable is $0$ output Y

should be $0$ else the output will be assigned with input based on select value.q$1$