5. a) Consider a Delta Modulator with step size, A, for source-coding the sampled message signal, m(t) 3cos(500xt)-4sin(1000xt)-5. Assuming m(t) is sampled at the Nyquist sampling rate, what is the minimum value of step size, A, needed to avoid slope overload? b) A signals, mi(t), is band-limited to 5 KHz, and three other signals, my(t), mi(t) and mu(t), have a bandwidth of 2.2 KHz. These signals are to be transmitted by means of time-division multiplexing (TDM). Set up a TDM scheme for accomplishing this multiplexing requirement, with each signal sampled at or above its Nyquist rate. If the commutator output is quantized with L.-512 levels and the resulting samples are binary coded, determine the output Bit Rate. c) For binary signaling of rate 1/Ts, consider the pulse shape, p(t)-A). For a random data sequence of 101001101001, sketch the baseband signal waveforms if the line code is (i) polar, (ii) on/off. Also, sketch the eye diagrams over (-1/2, T/2).