A customer support center for a computer manufacturer receives an average of 1.5

A customer support center for a computer manufacturer receives an average of 1.5 phone calls every 5 minutes. (9 points)
Find the probability that no calls will arrive during the next 5 minutes. (3 points)
Find the probability that three or more calls will arrive during the next 5 minutes. (3 points)
What is the probability that three calls will arrive during the next 10 minutes. (3 points)

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