FIR filter design with different windows $-$ Design a causal low$-$pass FIR

digital filter with N$=21.$ The desired magnitude response of the filter is

$|$H$\_($d$)($e$^($j$\backslash$omega Tf Hertz $],[0,$ elsewhere in ff$\_($s$))/(2))]\}$

And the phase is zero for all frequencies. The sampling frequency f$\_($s$)=$

$2000$ Hz $.$

$($a$)$ Use a rectangular window in your MATLAB design. Plot magnitude and

phase of the desired filter with MATLAB.

$($b$)$ Use a triangular window in the design and compare the

magnitude and phase plots of this filter with those obtained in

part $($a$).$

PLEASE SOLVE USING MATLAB.