A single-tone message signal of bandwidth 4 kHz is sampled by using a pulse train of frequency 200% higher than the Nyquist rate of the message…

A single-tone message signal of bandwidth 4 kHz is sampled by using a pulse train of frequency 200% higher than the Nyquist rate of the message signal to obtain PAM signal. The duty cycle of the pulse train is 20%. By drawing the amplitude spectrum of the PAM signal, determine its bandwidth.