A basic difference between infinite source and finite source queuing models is: Select one: O a. The average arrival rate O b. The potential number of customers Oc The average waiting time Od. The number of servers Oe. The processing rate The goal of queuing analysis is to minimize: Select one: O a. None of the choices O b. The sum of customer waiting time and service time Oc. The sum of customer waiting costs and costs of providing capacity O d. Costs of providing capacity Oe Customer waiting time Which quality tool is helpful in organizing and categorizing the possible causes of a problem? Select one: . Histogram O b. None of the choices . Cause-and-effect diagram O d. Pareto chart Control Charts