Service times for customers at a post office follow some right-skewed distribution with mean 2.97 minutes and standard deviation 1.82 minutes. (a) Can you calculate the probability that the average service time for the next two customers is less than 2.7 minutes? If you can, then calculate it. If you can’t, explain why not. (b) What is the probability that the mean service time for a random sample of 31 customers is between 2.5 and 3.19 minutes? (c) What is the probability that the total service time for the next 48 customers exceeds 161.73 minutes? (Assume that the next 48 customers represent a simple random sample and that there is always a customer waiting in line.) (d) What is the probability that the mean service time for a random sample of 58 customers is exactly 3.65 minutes? (e) Are the probabilities you calculated in (b) and (c) exact or approximate? Explain.