I got the bottem two wrong can someone please help? and can you please show work?

Melanie is the manager of the Clean Machine car wash and has gathered the following information. Customers arrive at a rate of 36 per hour according to a Poisson distribution. The car washer can service an average of 40 cars per hour with service times described by an exponential distribution. Melanie is concerned about the number of customers waiting in line. Melanie realizes that how long the customer must wait is also very important. She is also concerned about customers balking when the waiting line is too long. Calculate the following system characteristics: (Round answers to 2 decimal places, e.g. 0.15.)