Customers enter the camera department of a store at the average rate of six per hour. The department is staffed by one employee, who takes an average of 8.0 minutes to serve each arrival. Assume this is a simple Poisson arrival, exponentially distributed service time situation. Use Exhibit 10.9 . a-1. As a casual observer, how many people would you expect to see in the camera department (excluding the clerk)? Note: Round your answer to 2 decimal places. a-2. How long would a customer expect to spend in the camera department (total time)? Note: Round your answer to 2 decimal places. b. What is the utilization of the clerk? Note: Round your answer to 1 decimal place. c. What is the probability that there are more than two people in the camera department (excluding the clerk)? Note: Round your intermediate calculations to 3 decimal places and final answer to 1 decimal place. d. Another clerk has been hired for the camera department who also takes an average of 8 minutes to serve each arrival. How long would a customer expect to spend in the department now? Note: Round your answer to 1 decimal place. Use the closest value of / in Exhibit 10.9 when determining Lq (i.e., do not interpolate)