QUESTION 4 A coffee retailer sells 100 bags of coffee per day. The manager wants to keep sufficient inventory for 2 days of supply. What is the number of inventory? O 200 O 100 O 50 O 150 QUESTION 5 An agent serves a customer for 5 minutes on average, and the standard deviation of the processing time is 1.2 minutes. The demand rate is 10 customers/hour, and the coefficient of variation of the arrival process is 0.3. Assume that there is only one agent in the office. What is the average waiting time for a customer? O 4.167 minutes O 1.845 minutes 2.214 minutes O 6.75 minutes