If customers arrive according to a Poisson arrival rate with an average of 16 customers/hour, what is the probability of having more than 12 customers arrive in an hour? (Note - this is not a 'Waiting Lines' question that uses the Excel template, but rather is a question about Poisson arrivals and would use the Poisson equation seen in the lab, text and in class. You will most likely require a spreadsheet to be efficient in answering this question).