To pick up your holiday dinner order at Bavarian Inn, you need to drive in and wait in a queue. You are also informed by the managers of the Inn that the amount of time you wait in line before receiving your order will be exponentially distributed with a cumulative density function as F(x) = 1 - e-0.4x (in minutes). a) So what is the average waiting time for you to pick up your order? What is the probability that you spend less than 2 minutes to pick up your order?(express the PMF formula and parameter values used clearly) c) What is the probability that you will wait more than the average wait time to receive your order? (express the PMF formula and parameter values used clearly)