$55$ patients$/$hour$,$ Buffer $1$ has $7$ patients waiting, Buffer $2$ has $34$ patients waiting, the registration takes $2$ minutes and the doctor takes $13$ minutes

Complete the table above based on the process diagram.

a$.$ What is the flow unit of this process?

b$.$ What is amount of inventory inside the process boundaries of this process? Use units of measure consistent with this problem.

c$.$ What is the throughput of this process? Use units of measure consistent with this problem?

d$.$ What is the flow time of this process in minutes?

e$.$ On average, how long $($in minutes$)$ is it before a patient sees the doctor?