Please answer parts A-D

A simple random sample of size n is drawn from a population that is normally distributed. The sample mean, X, is found to be 111, and the sample standard deviation, s, is found to be 11. (a) Construct a 95% confidence interval about u if the sample size, n, is 21 (b) Construct a 95% confidence interval about u if the sample size, n, is 14 (c) Construct a 90% confidence interval about p if the sample size, n, is 21 (d) Should the confidence intervals in parts (a)-(c) have been computed if the population had not been normally distributed? GO (a) Construct a 95% confidence interval about if the sample size, n, is 21 Lower bound Upper bound I (Round to one decimal place as needed.)