A pharmacy has a counter with the capacity to serve one customer at a time, and a waiting area for 5 customers. The washing service time follows an exponential distribution with an average of 10 minutes. Customer arrivals at the entrance of the establishment could be modeled as Poisson arrivals with an average of 7 customers per hour. Each client that is served, on average generates a profit of $ 5.00. In this scenario, there is the possibility of renting 5 additional waiting spaces for clients at a cost of $ 40 per day. The pharmacy's hours of operation are 12-hours per day. It is desired to estimate whether the rental of the additional space would be cost-effective. Hint: To answer the exercise, you must calculate for each scenario the average number of clients per hour and per day that are served. Detailed answer with formulas please.