Please solve using R Studio

1. A study was performed to investigate the variability of cholesterol and other lipid measures in children. The reported within-subject standard deviation for cholesterol in children was o = 7.8 mg/dL. Suppose 40 total cholesterol determinations are obtained from a random sample of children, yielding an average value of 200 mg/dL. (a) What type of confidence interval are you going to perform for this data? Justify your answer. (b) Calculate and Interpret a 90% CI for the true mean total cholesterol for the children