5) Suppose that flight arrival at El Paso airport follows a Poisson distribution with the rate of one flight every 5 minutes. a) What is the expected number of arrivals in 80 minutes? b) What is the probability of 3 arrivals in 20 minutes? c) What is the probability of no flight arrivals in 15-minute period? r2) A report shows that online game players, on average, spend 40 minutes on each session. Suppose that the time the players spend on the games follows an exponential distribution a) Write the exponential distribution function for the time spent by players on a single session. b) What is the probability that a player spends between 30 to 50 minutes on a single session? c) What is the probability that a player will spend more than 1 hour on a single session?