The manager is concerned about the average time for getting an order ready for pick- up (either by a full-service shopper or the customer). Please note that this includes both the time duration from the arrival of the order to the moment it starts to be processed by a shopper, and the processing time (shopping, checkout, and moving to the staging area). She finds that it is difficult to change the order arrival pattern or the processing speed of the in-store shoppers, and decides to check if they can potentially reduce the time by changing the number of in-store shoppers. To reduce the average time for getting an order ready below 45 minutes, how many in-store shoppers are required in total? B B Interarrival_times_(minutes) 2.8 B 6.4 3.5 5 0.1 5 1.5 3.3 B 0.8 - 7.1 0 1 2. 3 4 5 6 7 8 9 0 1 2. 3 4 5 6 0.8 1.2 0.1 12.8 8.1 3.7 3.6 8.1 4.1 0.7 2.7 5.2 3.3 0.5 0.6 10 w TN N #1 19 Time of picking items Time fo checkout and Order # (minutes) moving to the staging area (minutes) 27 7 #2 13 4 #3 10 6 #4 17 5 #5 25 25 #6 12 12 #7 7 2 #8 26 11 #9 37 37 #10 18 18 #11 19 #12 33 33 #13 14 14 #14 26 26 #15 31 #16 23 23 #17 39 14 #18 14 4 #19 60 20 #20 41 11 #21 29 11 #22 19 5 #23 34 9 #24 21 6 #25 36 15 31