Question #$3$: $($DTFT Properties$)$

This question explores the properties of the DTFT$.$ Use the DTFT function to compute the frequencydomain magnitudes and phases of the following signals. Plot the time$-$domain signal, the magnitude response, and the phase response. Use Question #$1$ as a guide for plotting. Each question uses the following signal:

$x[n]=[(\frac{25}{46})-(\frac{21}{46})cos((\frac{}{6})n)](u[n]-u[n-12])$

For each question, use only $40$ values for $n$ corresponding to $n=0$ to $n=39.$

For each question, describe how each system changes the frequency domain.

$($a$)y[n]=x[n]$

$($b$)y[n]=x[n-2]$

$($c$)y[n]=x[n]cos((\frac{}{2})n)$

$($d$)y[n]=x[n]**x[n]$

$($e$)y[n]=x[n]+(x[n]cos(n))$

NEED HELP WITH THE CODE