1. A compact disc (CD) records audio signals digitally using PCM. The audio baseband signal's bandwidth is 15 kHz. (a) If the Nyquist samples are uniformly quantized into L = 65,536 levels and then binary-coded; determine the number of binary digits (bits)n required to encode a sample. How many bits per second are being transmitted? (b) If the audio signal has an average power of 0.125 watt and a peak voltage of 1 volt. Find the resulting ratio of signal-to-quantization noise ratio (SONR) of the uniform quantizer output in part (a). (c) Determine the number of binary digits per second (bps) required to encode and transmit the audio signal. (d) In practice, CD music is sampled at a rate of 44,100 samples/second, which is above the Nyquist rate. Still retaining the number of levels L to be 65,536 levels, determine the bit rate needed to support this higher sampling rate. What is the minimum bandwidth needed to support this higher data rate