A cruise company would like to estimate the average beer consumption to plan its beer inventory levels on future seven-day cruises. (The ship consumption over 15 randomly selected seven-day cruises was 81 906 bottles with a sample standard deviation of 4 575 bottles. Complete parts a and b below. a. Construct an 80 confidence interval to estimate the average option per cruise. The 80% confidence interval to estimate the average be ption per cruise is from a lower limit of |bottles to an upper limit of |bottles (Round to the nearest whole numbers.)