The following are the sample data sets from your class project about waiting line theories:
arrival: 1, 3, 3, 3, 4
service time: 33, 33, 52, 69, 58
the arrival data were number of cars arrived per every 5-minute interval, and the service data were the number of seconds spent on taking the corresponding order. what is the expected total number of customers (cs) in the store for a given 5-minute interval? give your answer to 2 significant places.