1. Suppose a signal that ranges over the interval [-20, 20] is applied to a quantizer employing 256 levels. -Determine the required step size if a uniform quantizer is employed. -Determine the smallest and the largest effectiveseparation between levels if a nonuniform u-law quantizer with p=255 is employed. 2. Source emits seven messages with probabilities (1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/64). Find Entropy of source. Obtain a compact code (Shannon-Fano code). Find average code length, determine the efficiency and the redundancy of the code. 3. Let us assume the even parity hamming code is transmitted and the received code is (110001101). Now from the received code, let us detect and correct the error. 4. Assume that - data is 10110. Code generator is 1101. Find CRC codeword. Error occurred in second left bit. Determine the corresponding syndrome