minutes until the next eruption. b . Calculate the 9 5 t h percentile of times between geyser eruptions. c . Calculate the probability that the geyser will erupt at least once in the next 2 hours ( 1 2 0 minutes ) . d . How many times do you expect the geyser to erupt in the next 8 hours ( 4 8 0 minutes ) ? e . Calculate the probability that the geyser will erupt exactly 4 times in the next 8 hours.