The message signal m(t), whose spectrum M(f) is shown below, is passed through the system shown in that figure. m(t) y(t) = x(t) Square Law Bandpass YEEKE Filter M (f) os2 fot x(t) Device -W cos2nfot W Y (t) Y3 (t) Lowpass Filter Y4 (t) The bandpass filter has a bandwidth of 2W centered at fo, and the lowpass filter has a bandwidth of W. Plot the spectra of the signals x(t), y(t), Y(t), y(t), y(t). What are the bandwidths of these signals? Act