Aria runs a small shop where she provides a service. She is able to process an average of 8 customers per hour. An average of 5 customers per hour seek this service at her shop. What is: 5. the probability that Aria will not be working with a customer (no customers) when the shop phone rings? 6. the probability of 5 customers in the system? 7. the average time a customer spends waiting in line (in minutes)? 8. the average number of customers waiting in line? 9. the average number of customers in the system? Aria would like to be serving customers 90% of the time. 10. What must the arrival rate be in order for Aria to stay that busy? Do not round to an integer