In a sample of 56 tax returns filed by local hotel managers in a recent year, the taxable incomes are found to have a mean of $41225 and a population standard deviation of $6112. Construct the 99% confidence interval for the mean taxable income of all local hotel manager that year. Select one: O a. 39624 < Mu < 42826 O b. 39255 < Mu < 41259 O c. 39122 < Mu < 43328 O d. 39121 < Mu < 43327 Find the minimum number of football fans required in a poll to estimate, within 1.5%, the percentage who helieve that LeBron James could play in the NFL. Use 90% confidence, and assume no prior estimate of the percentage in question is available.

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