operations research

a In a Drag Store the rate for the number of the customers is ([Last Digit is 5] 9) (Last Digit is 13,7,9] 6) (Last Digit is 0,2,4,6,8] 8) customers per hours. On an average a doctor can serve customers at rate of one every 6 minutes. Find average number of the customers in the clinic (system) and queue? b. Find average waiting time in the queue? C What is the probability that the clinic be empty? d. What is the probability that exactly (Last Digitis Even] 4) ([Last Digit is Odd] 5) customers present in the system? Whit which probability the number of the customers in the system can be (Last Digit is Even] between 6 and 9) (Last Digitis Odd] between 7 and 10)? e a In a Drag Store the rate for the number of the customers is ([Last Digit is 5] 9) (Last Digit is 13,7,9] 6) (Last Digit is 0,2,4,6,8] 8) customers per hours. On an average a doctor can serve customers at rate of one every 6 minutes. Find average number of the customers in the clinic (system) and queue? b. Find average waiting time in the queue? C What is the probability that the clinic be empty? d. What is the probability that exactly (Last Digitis Even] 4) ([Last Digit is Odd] 5) customers present in the system? Whit which probability the number of the customers in the system can be (Last Digit is Even] between 6 and 9) (Last Digitis Odd] between 7 and 10)? e