9) You are the manager of a fast-food restaurant and you're analyzing the demand for drive- thru service. Past data shows that the number of orders at your drive-thru follows a Poisson distribution with an average of 18 orders per hour. This information is crucial for determining how many staff members you need to schedule. a) Estimate the number of expected orders in a 9-hour shift. (SHOW WORK; 0.5 pt) b) Estimate the probability that the drive-thru receives exactly 4 orders in a 15-minute period. (SHOW WORK; 0.5 pt) What is the probability the drive-thru receives at least 2 orders during a 20-minute period? (SHOW WORK; 0.5 pt)