An M$//$M$//3$ system has an arrival rate of $16$ customers per hour. Each server has a service rate of $6$ customers per hour.

a$.$ What is the utilization factor for this system?

Note: Round your answer to $3$ decimal places.

Utilization factor$\_\_\_\_\_$

b$.$ If all servers are kept busy, how many services will be completed per hour on average?

Note: Round your answer to the nearest whole number.

Services completed per hour$\_\_\_\_\_$