Consider an audio signal with spectral components limited to the frequency band 300 to 3300 Hz. A sampling rate of 8000 samples per second is used to generate a PCM signal. Assume the ratio of peak signal power to average quantization noise power at the output of the quantizer needs to be at least 30dB. (a) Determine the minimum number of uniform quantization levels needed to meet the requirement. (b) Find the minimum number of bits per sample to satisfy the requirement.