In the study of operations management, one considers problems faced in job-shop scheduling, where jobs are basically made to order and there are uncertainties in demand. One possible way of meeting uncertainty in demand is to hire personnel on a part-time basis. If no backlog exists at the start of the week, it is the custom of the Pierce Arrow Company to call in additional workers according to the following schedule, depending on the orders received in the Monday morning mail: Orders Received 0-3 4-7 8-11 12 or More Additional Workers 0 1 2 3 If orders received on Monday follow a Poisson distribution with the mean number of orders received equal to 8, find the probabilities that 0, 1, 2, and 3 additional workers will be needed