please explain all steps clearly

Problem 1. The management of Zurger Dome fast-food restaurant wants to evaluate the desirability of opening a second order-procession station so that two customers can be served simultaneously. Assume a single waiting line with the first customer in line moving to the first available server. Assume that on average, 45 customers arrive per hour, and that each server takes an average of 1 minute to serve a customer. (a) What fraction of the time is the system idle? (b) Calculate the average length of the queue. (c) On average, how long does a customer wait in line? (d) What is the average number of customers in the system? (e) On average, how much time does a customer wait in the system