Do you dislike waiting in line? Supermarket chain Kroger has used computer simulation and information technology to reduce the average waiting time for customers at stores. Using a new system called QueVision, which allows Kroger to better predict when shoppers will be checking out, the company was able to decrease average customer waiting time to just seconds (InformationWeek website and The Wall Street Journal website, January , ). a. Which of the exponential probability distribution is applicable and Show the probability density function of waiting time at Kroger. a. for b. for c. for d. for b. What is the probability that a customer will have to wait between and seconds (to 4 decimals)? c. What is the probability that a customer will have to wait more than minutes (to 4 decimals)?