A coffee shop experiences an average arrival rate of 10 customers per hour and the average time a customer spends in the shop (including ordering, waiting, and drinking) is 30 minutes. What is the average number of customers in the shop at any given time, assuming a steady state? (Convert 30 min to 0.5 hour) Little's Law states: Average Inventory (Q) = Throughput Rate () * Average Flow Time (W)