I need help with these two problems

D Question 4 How much money does the average professional football fan spend on food at a single football game! That question was posed to 45 randomly selected football fans. The s he results provided a sample mean and standard deviation of $18.00 and $3.15, respectively, Part a: State the assumptions that are required for this interval to be valid. Part b: Construct a 99%% confidence interval. Part c: Interpret the confidence interval in (bl. D Question 5 The average cost per night of a hotel room in New York City is $273. Assume this estimate is based on a random sample of 45 hotels and that the sample standard deviation is $65. Part a: Construct the 92% confidence interval estimate of the population mean. Part b: Interpret the confidence interval. Part c: What are the assumptions required for this confidence interval to be valid? Part d: What will happen to the width of the confidence interval if the confidence coefficient would increase to .95? Part e: What would happen to the width of the confidence interval if the sample had 100 hotels