An amusement park has a roller coaster that can accommodate up to 45 park goers per ride, and each ride lasts about 20 minutes. For each hour, the park gives out 200 tickets for the ride, and on average, only 60% of the ticket holders come to ride on the roller coaster. The number of roller coaster riders follows a normal distribution with a mean of 120 riders per hour and standard deviation of 35 riders. Develop a Monte Carlo simulation using Analysis ToolPak or R, both with a seed of 1, of 400 trials. What is the average number of riders unable to get on the roller coaster?