Allegiant airlines charges a mean base fare of $89. in addition, the airline charges for making a reservation on its website, checking bags, and inflight beverages. these additional charges average $35 per passenger. suppose a random sample of 60 passengers is taken to determine the total cost of their flight on allegiant airlines. the population standard deviation of total flight cost is known to be $37. use z-table. a. what is the population mean cost per flight? $ b. what is the probability the sample mean will be within $10 of the population mean cost per flight (to 4 decimals)? c. what is the probability the sample mean will be within $5 of the population mean cost per flight (to 4 decimals)?