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Problem 11-19 (Algorithmic) All airplane passengers at the Lake City Regional Airport must pass through a security screening area before proceeding to the boarding area. The airport has three screening stations available, and the facility manager must decide how many to have open at any particular time. The service rate for processing passengers at each screening station is 3 passengers per minute. On Monday morning the arrival rate is 5.2 passengers per minute. Assume that processing times at each screening station follow an exponential distribution and that arrivals follow a Poisson distribution. When the security level is raised to high, the service rate for processing passengers is reduced to 2 passengers per minute at each screening station. Suppose the security level is raised to high on Monday morning. Note: Use Po values from Table 11.4 to answer the questions below. a. The facility manager's goal is to limit the average number of passengers waiting in line to 7 or fewer. How many screening stations must be open in order to satisfy the manager's goal? Having 3 station(s) open satisfies the manager's goal to limit the average number of passengers in the waiting line to at most 7. b. What is the average time required for a passenger to pass through security screening? Round your answer to two decimal places. W X minutes Agan Interior Design provides home and office decorating assistance to its customers. In normal operation, an average of 2.9 customers arrive each hour. One design consultant is available to answer customer questions and make product recommendations. Agan's management would like to evaluate two alternatives: Use one consultant with an average service time of 8 minutes per customer. Expand to two consultants, each of whom has an average service time of 10 minutes per customer. If the consultants are paid $19 per hour and the customer waiting time is valued at $27 per hour for waiting time prior to service, should Agan expand to the two-consultant system? No What is the total cost for each scenario? Round your answers to the nearest cent. X. The total cost for the second scenario where The total cost for the first scenario where there is one consultant with an average service time of 8 minutes per customer is $ there are two consultants with an average service time of 10 minutes per customer is $ X Note: Use Po values from Table 11.4 to answer the questions below