$($Q$3-$ Q$10)$ A Service System

Consider the following service system. The average inter$-$arrival time is $10$ minutes, and the standard deviation of the inter$-$arrival time is $10$ minutes. The average processing time is $5$ minutes with the standard deviation of the processing time being $6$ minutes.Question $5$

What is the utilization of the server?

Question $6$

What is the value of $T_q$ in minutes?

Question $7$

What is the value of $T$ in minutes?

Question $8$

What is the value of $I_q?$