A bus comes by every 11 minutes The times from when a person arives at the busstop until the bus arrives follows a Uniform distribution from 0 to 11 minutes A person arrives at the bus stop at a randomly selected time Round to 4 decimal places where possible a The mean of this distribution is b The standard deviation is c The probability that the person will wait more than 5 minutes is d Suppose that the person has already been waiting for 1 3 minutes Find the probability that the person s total waiting time will be between 3 4 and 3 8 minutes e 79 of all customers wait at least how long for the train minutes