$($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 $9$

What is the value of I?

Question $10$

What is the value of Ip$?$