Community Bank is planning to expand its drive-in facility. Observations of the existing single-teller window reveal that customers arrive at an average rate of 10 per hour, with a Poisson distribution, and that they are given FIFO service, with an average transaction time of 5 minutes. Transaction times have a negative exponential distribution. Community Bank has decided to add another teller. The cost of keeping a customer waiting in the system is represented as a $5-per-hour loss of goodwill. The hourly cost of a teller is $10. a) Assume that each teller is assigned two stations exclusively, that demand is divided equally among the stations, and that no customer jockeying is pemitted (i. e., customers can't switch between stations once they are in line). What is the average number of customers waiting in the entire system? Here, we want the total number of customers from the two stations and lines (round your response to 3 decimal digits).