I know the anwser is NOT E

A regional airline is concerned about its on-time performance. The Memphis hub experiences 20 flight operations each day of the week, with the following record of on-time departures for the previous 10 days: 17,16,18,19,16,15,20,17,18, and 16. Prepare a p-chart with a sample size consisting of one week's average on-time percentage. a. UCL=.86,LCL=0 b. UCL=.93,LCL=0 c. UCL=1,LCL=.47 d. UCL=1.25,LCL=.47 e. None of the above