please answer parts 12-14 as they are all apart of the question and show work. thank you!

McDonald's (located across the street from the McNeese campus) is analyzing its two-step drive- through process for a given time period. The process is simple: a car arrives and waits in one of two order queues, then places and order and proceeds to wait in a single window queue before receiving their food, and exiting the system. Though not their busiest period, McDonalds has provided us with an arrival rate of 1 = 3 customers per minute and the following metrics: Order queue Window queue Number of servers two M/M/1 queues one M/M/1 queue Arrival rate X/2 per minute per minute Service time E (T) = 0.5 minutes E[T) = 0.2 minutes 12. Determine the distribution of the variable L for the window queue. 13. Calculate the descriptive statistics (mean and standard deviation) for the average mumber of customers (waiting and being served) at the window queue. 14. What is the probability of less than or equal to two customers in the system, P(L