Question: Problem 4 In source coding, that is , representing symbols coming from a source by binary sequences, the code is considered optimal if the expected

Problem 4 In source coding, that is, representing symbols coming from a source by binary
sequences, the code is considered optimal if the expected codeword length is equal to
the source entropy. In the following Table, a source is shown that generates just four
symbols, together with the symbol probabilities, and codewords that represent them.
Examine whether the code is optimal.

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