[6 points] (a) What would be the total time to it would take to send the following ASCII message over a 9600 bps communications channel: messageone (1) If asynchronous transmission was being used. (2) If synchronous transmission was being used. Assume that the frame has a two byte header and a two byte trailer. [6 points] (b) Given an analog signal with signal amplitudes of 12.3, 5.9, 0.1, 30.8 at successive sampling times. (1) What would be the bit stream sent if a PCM technique was used to sample the data? (2) What would the data rate be if the signal were being sampled every ms. Assume that the minimum necessary number of bits was being used to encode the above values. [8 points] (c) Given a voice grade communications channel: (1) What is the nominal bandwidth of the channel? (2) What is the PCM sampling rate for this channel? (3) Why was this rate chosen? (4) What is the actual digitized bit rate for this channel?