During the peak hours ( 4pm8pm ) on a typical weekday, an order for the in-store shoppers is received every 9 minutes on average. Assume the same time estimates and number of shoppers as in the previous question. That is, it takes 25 minutes on average for a shopper to pick all items on the list, and 15 minutes to check out the items and move them to the staging area; the total number of in-store shoppers is 11. What is the average utilization of a shopper