The times that a council worker spends processing each person's order is normally distributed with a mean 20 minutes and standard deviation 5 minutes. a) What is the probability a person's order will take more than 27 minutes? b) Under what time will the fastest 10% of orders take to process? c) What is the probability that the orders of 16 people can be processed by the council worker with an average of less than 22.5 minutes per person