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12.2-5 A source emits three equiprobable messages randomly and independently. (a) Find the source entropy. (b) Find a compact ternary code, the average length of the codeword, the code efficiency, and the redundancy. (c) Repeat part (b) for a binary code. (d) To improve the efficiency of a binary code, we now code the three consecutive messages fro1n the source. Find a compact binary code, the average length of the codeword, the code efficiency, a11d the redundancy.

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