What is the utilization of the server

Question

You jump out of your car at a location known to have one ATM, but a history of a line. Usually you can expect to wait 200 seconds from the time you arrive until leaving with the $. Service time averages 35 seconds. Show all work! Formulas to use are: p=^/u, L=^W, W=1/u-^, Lq=pL, Wq=pW

Questions are:

1. What is the utilization of the server?_______%
2. What is the expected time between people arriving to this system?_______seconds.
3. How long is the line expected to be upon arrival?________people.
4. What is the service rate of the server? _______people/second.