In a newspaper stand, there is one worker serving customers. The average service time for a customer is 2 minutes, with a standard deviation of 0.5 minutes. On average, customers arrive at the stand every 3 minutes, and the coefficient of variation for the arrival process is 0.6. What is the average waiting time for a customer? O 0.564 minutes O 0.625 minutes O 0.845 minutes O 0.932 minutes

A fast-food restaurant has four kiosks. Customers are only able to place their orders through these kiosks. The customers arrive at the restaurant following a Poisson process, with an average interarrival time of 1.5 minutes. On average, each kiosk takes 4.5 minutes to serve a customer, and the service time follows an exponential distribution. What is the average waiting time for a customer to use a kiosk? (Note: All customers are waiting in the same line). O 2.416 minutes O 2.891 minutes O 3.245 minutes O 3.653 minutes