how do i solve this

A bottled water distributor wants to estimate the amount of water contained in 1-gallon bottles purchased from a nationally known water bottling company. The water bottling company's specifications state that the standard deviation of the amount of water is equal to 0.02 gallon. A random sample of 50 bottles is selected, and the sample mean amount of water per 1-gallon bottle is 0.964 gallon. Complete parts (a) through (d). a. Construct a 95\% confidence interval estimate for the population mean amount of water included in a 1-gallon bottle. (Round to five decimal places as needed)