3.6.2. Suppose a PAM system in which a number of audio signals (each with maximum frequency 24 kHz) and two video signals (with maximum frequency 2 MHz) are to be time-division multiplexed into a single signal that sends 5500 kpulses/s. Suppose the video signal is oversampled at 20% beyond the Nyquist rate. (a) What is the maximum number of audio signals that can be supported? (b) Suppose 10 audio signals are utilized. What is the maximum percentage oversampling permitted on these audio signals?