An average of 12 customers arrive at a service center each hour (Poisson distributed) There are two servers on duty, and each server can process 10 customers per hour (Poisson distributed) Use Table 184. 0. What is the system utilization? (Round your answer to 2 declmals.) b. What is the average number of customers in the system (waiting plus being served)? (Do not round Intermedlate caleulations. Round your onswer to 3 decimals. c. What is the average time customers wait in line for service? (Do not round Intermedlate calculations. Round your answer to 3 decimais.) d. What is the average waiting time for customers who actually have to wait? (Round your anawer to 3 decimals.)