On Monday mornings, a CIBC branch has only one teller window open for deposits and withdrawals. Experience has shown that the average number of arriving customers in a 4-minute interval on Monday mornings is 2.8, and each teller can serve more than that number efficiently. The random arrivals at this bank on Monday mornings are Poisson distributed. Appendix A Statistical Tables a. What is the probability that on a Monday morning exactly six customers will arrive in a 4-minute interval? Round your answer to 4 decimal places