1. The IT department of a high tech company handles employee requests for assistance when computer questions arise. Employees requiring assistance phone the IT department with their questions (but may have to wait on hold if all of the tech support staff are busy). The IT department receives an average of 40 requests for assistance per hour (Poisson). The average question can be answered in 3 minutes (exponential). The IT staff is paid an average of $15 per hour. The average employee earns $25 per hour. The management needs to know the optimal size of the IT tech support staff.