Please answer

You're working on your wing's flying hour budget for FY28 and you want to estimate the number of flying hours per month for pilots in your wing, give or take 1.5 hours. Unfortunately, the electronic flight logs were hacked and wiped out last week. Fortunately, you do have some reports that show that the historic standard deviation for flying hours per pilot per month is 4, and the pilots keep paper backup logs. How many pilot flight logs do you need to sample to be able to estimate mean flying hours within 1.5 hours with 95% confidence? 27 O 20