Can i get some help with these problems????

Problem 7 (4 points) Suppose the average number of emails received by the junior analyst at your company is 5 emails/hour. Suppose the count of emails received can be modeled by a Poisson random variable. a. What is the probability that this junior analyst receives exactly 5 emails in any given hour? b. What is the standard deviation of this Poisson distribution? Section II. Excel Work. Using Excel to Compute Binomial Probabilities (2 points) One option is to use Excel's BINOM. DIST Problem 8 (2 points) Martin Clothing store The store manager wants to determine the purchase decisions of next three customers who enter the clothing store. On the basis of past experience, the store manager estimates the probability that any one customer will make a purchase is .30. Use Excel to compute P(X=0), P(X=1), P(X=2), and P(X=3) Copy and paste your outcome to this document. No need to show work. Using Excel to Compute Poisson Probabilities One option is to use Excel's POISSON. DIST Problem 9 (2 points) Arrivals at the drive-up teller window of a bank The average number of cars arriving at the drive-up teller window of a bank in a 15 -minute period of time on weekday mornings is 10. Use Excel to compute P(X=0), P(X=1), P(X=2), P(X=3) to P(X=10). Copy and paste your outcome to this document. No need to show work. [ FOCUS