How do you find the population proportion for the Fox TV network?

How would I find the population proportion for this example?

The Fox TV network is considering replacing one of its prime-time crime investigation shows with a new family-oriented comedy show. Before a final decision is made, network executives commission a sample of 400 viewers. After viewing the comedy, 250 indicated they would watch the new show and suggested it replace the crime investigation show.

I need to estimate the value of the population proportion, compute the standard error of the proportion, and develop a 99 percent confidence interval for the population proportion. From this I need to interpret my findings.

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