I need the work to be shown please

Asimple random sample of size nequals14 is drawn from a population that is normally distributed. the sample mean is found to be x overbar equals 70 and the sample standard deviation is found to be sequals13. construct a 90% confidence interval about the population mean

Maria walks a round trip of 0.75 mile to school every day.how many miles will she walk in 4.5 days

700 miles the train takes 5 hours to a travel the distance at what unit rate is the train traveling?