In a recent survey of n adults, 20% indicated that they did not watch television in the past month.

1. If the margin of error for the population proportion for a 95% confidence level is 0.0392, what is the sample size of this survey? The result should be an integer number. Round to the closest integer number (e.g if the result is 36.7 write 37).

2. Estimate the standard error of the sample proportion. The result should be given to 4 decimal places (e.g if the result is 0.98568 write 0.9857)

3. Construct a 87% Confidence Interval for the population proportion of adults who did not watch television in the past month. Write below the upper limit of this Confidence Interval. Your answer should be in % and have two digits after the period. So, if your answer is 50.023%, enter 50.02.