<p><img alt="An information source generates symbols at random from a four-letter alphabet (a, b,c,d with probabilities Pr[a] 5/9. PT固ー2/9" src="https://media.cheggcdn.com/media%2Fe14%2Fe149586a-3eef-44f6-9b98-e54f12c39d1b%2Fphp674IAK.png" style="height:191px;width:693px;" aria-describedby="d3f"/></p>An information source generates symbols at random from a