let t be the average waiting time for a bus. (a) if t is a uniform distribution with mean 10 mins (so uniform on [0,20] mins), suppose you have waited for 10 minutes and the bus has not arrived yet, what is the expectation of your remaining waiting time? (b) if t is a exponential distribution with mean 10 mins, suppose you have waited for 10 minutes and the bus has not arrived yet, what is the expectation of your remaining waiting time? does this seem counter-intuitive?