I need a very clear explanation

5. Listed below are the ages, in years, of randomly selected race car drivers. Construct a 90% confidence interval estimate of the mean age of all race car drivers. 32 32 33 33 41 29 38 32 33 23 27 45 52 29 25 Round your answers to two decimal places. x : ( 32 + 32+ 33 ..... + 25 6. Use the data in problem #5 to construct a 90% confidence interval estimate of the population standard deviation of the age of all race car drivers. Round your answers to two decimal places