l. (Ch 15) If the mean time between inight aircraft engine shutdowns is 12,500 operating hours= the 913th percentile of the waiting time until the next shutdown is [Hint you need to convert the mean time between events to mean events per hour It, then applyr the approach of \"inverse exponential"]: 3.2111311} hours. 1]. 23,?82 hours. c. 23,?33 hours. d. 13,1'24 hours