Applications of the Poisson distribution were discussed in the Journal of Case Research in Business and Economics (December 2014). In one case involving a hospital emergency room, 2 patients arrive on average every 10 minutes. Let x = number of patients arriving at the emergency room in any 10-minute period. Assume that x has a Poisson distribution with mean 2. What is the probability that more than 4 patients arrive at the emergency room in the next 10 minutes?