Help quick please!!! I only have 20 minutes

If the bank branch office is operating at its optimal configuration (decided in Q20). determine the average time spent in the system per customer. 0.0203 hours 0.0657 hours 0.0435 hours 0.0869 hours Question 23 ( 2 points) Saved Refer to the information in Q20. If the bank branch office is operating at its optimal configuration (decided in Q20), determine the average time spent in the waiting line per customer. 0.0869 hours 0.0203 hours 0.543 hours 0.0461 hours Refer to the information in Q20. If the bank branch office is operating at its optimal configuration (decided in Q20), determine the average number of customers in the service process. 2.4 2.3334 2.6667 1.6 An average of 40 customers per hour arrives at a bank branch office (Poisson arrival) and wait in a single line to be served by the first available teller. The average time for each teller to service a customer is 4 minutes (exponentially distributed). Each teller earns $160/ day and the bank branch office assesses a waiting cost of $50/ day that a customer waits in the system. How many tellers should be on duty in this bank branch office to minimize the total cost of this waiting line system? 2 3 4 5 Question 21 (2 points) Saved Refer to the information in Q20. If the bank branch office is operating at its optimal configuration (decided in Q20), determine the probability that at least one teller is busy. 0.943 0.035 0.008