Hi, any help with this question please

Patients arrive to an urgent-care facility. Every patient must first sign in, possibly after waiting in a queue. After signing in, patients will either go to registration or go to trauma room, if they are seriously ill. They probably must wait in respective queues. Patients who have visited the Exam Rooms either exit the system or go to a Treatment Room and then exit. Patient going through Trauma then go to Treatment and the exit. The figure below depicts the story just presented. 7. Assume patients' interarrival times are exponentially distributed with mean 6 minutes. The number of servers at each station is shown with a white circle. The split probabilities are also shown. The service times are exponentially distributed, and their means are as shown in the table. a. For each station find the "traffic intensity" or "station utilization" Pration. b. Will this facility be able to handle the external patient load? Why? c. If you could add a single server to the system, what station would you choose to place the server at? Why