SIGNATURE Problem 2- (12 marks=3+3+3+3) A small town with one hospital has two ambulances. Requests for an ambulance during weekday mornings average 0.8 per hour and tend to be Poisson. Travel and loading/unloading time averages one hour per call and follows an exponential distribution. Find: a) What percentage of its time each ambulance is busy? SIGNATURE b)The average number of patients waiting. SIGNATURE c)The average time patients wait for an ambulance to be allocated. SIGNATURE d)The probability that a patient has to wait when s/he calls/requests an ambulance