Jobs arrive at a workshop, which has two work centres (A and B) in series, at an exponential rate of n per hour. Each job requires processing at both these work centres, first on A and then on B. Jobs waiting to be processed at each centre can wait in line; the line in front of work centre A has unlimited space, and the line in front of centre B has space for only q jobs at a time. If this space reaches its capacity, jobs cannot leave centre A. In other words, centre A stops processing until space becomes available in front of B. The processing time for a job is exponentially distributed with averages [A, B].

Develop a simulation model (in form of a flow chart) of this system to determine the following measures of performance:

1. The expected number of jobs in the workshop at a given time.

2. The expected completion time of a job.