Question 25 (3 points) In a single-server queuing system, if each customer arrives every six minutes with Poisson distribution and 20 customers are served per hour with a negative exponential distribution. The system utilization is: 1) 0.27 2) 0.02 3) 0.3 1) 0.5 Question 26 (3 points) In a single-server queuing system, if each customer arrives every 6 minutes with Poisson distribution and 20 customers are served per hour with a negative exponential distribution. What is the probability that no customers in the system? 1) 0.7. 2) Undecided. 3) 0.3. 04) 0.5