The Dominion Landing theme park has a new water ride, the Raging Rapids. The ride holds 36 people in boat-cars and it takes 4.1 minutes to complete the ride circuit. It also takes the ride attendants another 3.5 minutes (with virtually no variation) to load and unload passengers. Passengers arrive at the ride during peak park hours at the rate of 4.4 per minute (Poisson distributed). Determine the length of the waiting line for the ride.