Suppose that the length of a phone call, in minutes, is an exponential random variable with decay parameter 1/8. If another person arrives at a public telephone just before you, find the probability that you will have to wait more than five minutes. Let X = the length of a phone call, in minutes. What is m, u, and o? The probability that you must wait more than five minutes is O m =1/8, u and o = 8, P (x> 5) = 0.6354 O m =1/8, u and o = 8, P (x>5) = 0.5353 O m =8, u and o = 1/8, P (x>5) = 0.5359 O m=1/8, M and o = 8, P (x>5) = 0.5357