In a company that processes insurance claims, the average flow rate is 10 claims per hour and

Question:

In a company that processes insurance claims, the average flow rate is 10 claims per hour and the average throughput time is six hours.
a. How many claims are in the system on average?
b. If the demand for claims to be processed is seven per hour and the capacity is eight per hour, what is the flow rate?
c. What assumptions have you made in your answers?