MATLAB Session 01 - Homework Problem (8) ft, fftshift, abs functions in MATLA . Consider the pulse function signal below. x1 (t) stp_fn(t + 1)- stp fn(t+1) - Generate a time variable from-4 to 4 [sec] in 0.001[sec] step size. - Draw xlt) with respect to time using plot. Convert signals into "Frequericy Domain" signal. (amplitude only Use fft to convert x () into frequency domain (find syntax using doc ft). Use fftshift to correct frequency axis. - X() (you can also represent this in angular freq,X)) Use abs to find absolute value (amplitude) of signals in frequency.(find syntax using doc abs). - x,0) I (or in angular freq. IX,( ) Plot amplitude with respect to frequency X,Ivsf (2-D graph)