Queueing: Car Wash - utilization

We've had a lot of snow in Bloomington and my car got very dirty. I went to the local car wash and discovered a long queue. An analysis of the operation showed that customers were arriving at the rate of 36 per hour and the car wash can clean a car every 90 seconds. I noticed that both interarrival times and wash times were distributed exponentially.

What is the utilization of the car wash? (Round to the nearest hundredths)

What is the average number of cars in line at the car wash (INV_q)? (round to the nearest integer)

What is the total time (in minutes) that it will take me to get my car washed (including both queue time and wash time, also known as flow time or FT)? (Round to the nearest integer in minutes)