2- The PCM sampled are encoded into 6-bits system. If the signal fluctuated from 0.994V to 4.9V the minimum sampling rate used is 8kHz, calculate a) the quantization level. b) Step size or resolution. c) Maximum quantization error. d) Corresponding code, magnitude of quantized signal q(t) and quantization error Qe for the following x(t) 0.8V, 1.35V, 2.5 V and 3.6V 3- The PCM sampled shown in graph are encoded into 4-bits system. If sampling rate used is 8kHz, calculate a) the quantization level. b) Step size or resolution. c) Draw the corresponding code for first 5 samples by using Polar RZ wave coding. me23 14 interval 101 re voltage -13 4- Let us consider an example that relates the Nyquist and Shannon formulations. Suppose that the spectrum bandwidth 4kHz and channel capacity 20 kHz determine the value of SNR in dB that maintain it