in a certain telemetry system, there are four analog signals m1(t), m2(t), m3(t), and m4(t). the bandwidth of m1(t) is 3.6 kHZ, but for each of the remaining signals it is 1.4 kHZ. theses signals are to be sampled at rates no less than their respective nyquist rates and are to be word-by-word multiplexed . this can be achieved by multiplexing the PAM samples of the four signals and the binary coding the multiplexed samples (as in the case of PCM T1 carrier ) suggest a suitable multiplexing scheme for this purpose. what is the commutator frequency (in rotations oer second)