Solve Transfer function to state-spece representation???

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Q4] A compact disc (CD) records audio signals digitally by using PCM. Assume the audio signal bandwidth to be 15 kHz. (a) What is the Nyquist rate? (b) If the Nyquist samples are quantized into q = 65,536 levels and then binary coded, determine the number of binary digits required to encode a sample. (c) Determine the number of binary digits per second (bit/s) required to encode the audio signal. (d) If, for practical reasons, the signals are sampled at a rate well above the Nyquist rate. Practical CDs use 44,100 samples per second. If q - 65,536, determine the number of bits per second required to encode the signal, and the minimum bandwidth required to transmit the encoded signal.

2. Define aliasing, and why it should be avoided? The spectrum of selected CT signal is given below. Draw the spectrum of the sampled signal with critical sampling, undersampling by 30%, and oversampling by 50%. Discuss the result. 1.0 -100 100 f (kHz)