please answer these

The International Air Transport Association surveys business travelers to develop quality ratings for transatlantic gateway airports. The maximum possible rating is 10. Suppose a simple random sample of 50 business travelers is selected and each traveler is asked to provide a rating for the Miami International Airport. The ratings obtained from the sample of 50 business travelers follow. 10 3 LO 5 6 7 8 8 8 4 6 5 7 4 5 5 7 6 8 9 10 10 3 1 9 8 8 9 9 10 6 9 6 8 8 10 10 2 5 1 8 6 Develop a 95% confidence interval estimate of the population mean rating for Miami. Round your answers to two decimal places.How large a sample should be selected to provide a 95%% confidence interval with a margin of error of 7? Assume that the population standard deviation is 50. Round your answer to next whole number