Multiple Server System Simulation

You are an engineering manager in charge of a service center where

customers arrive to the center with an arrival rate $=24$ customer $\frac{?}{hr}.$ As

shown in below figure, the service center has a single queue and $3$

parallel service stations each with a service rate $=10$ customer $\frac{?}{hr}.$ Both

inter$-$arrival and service times are exponentially distributed.