To support National Heart Week,the Heart Association plans to install a free blood pressure testing booth in El Con Mail for the week. Previous experience indicates that, on average. 8 persons per hour request a test. Assume arrivals are Poisson distributed from an innite population. Blood pressure measurements can be made at a constant time of six minutes each. Assume the queue length can be infinite with FCFS discipline. a. What is the average waiting line length {in people}? (Do not round intermediate calculations. Round your answer to 3 decimal places.) b. What is the average number of people in the system (both in line and at the window)? [Do not round intermediate calculations. Round your answer to 3 decimal places.) c. What is the expected average time in the system, in hours? (Do not round intermediate calculations. Round your answer to 4 decimal places.) d. On the average, how much time will it take to measure a person's blood pressure, including waiting time? (Do not round intermediate calculations. Round your answer to 4 decimal places.)