3.6.1. Suppose a message signal has maximum frequency 800 kHz. (a) Suppose Nyquist sampling is employed. What is the sampling rate and the time between successive samples? (b) If the sampling rate of part (a) is employed, and rectangular PAM is employed, what is rectangular pulse width if the utilization efficiency is 50%? (c) Suppose instead that the signal is sampled at a rate of 2000 ksamples/s. What is the percentage oversampling? (d) If the sampling rate of part (c) is employed, and rectangular PAM is used with a pulse width of 0.4 µs, what is the utilization efficiency?