The customer service center in a large New York department store has determined that the amount of time spend with a customer about a complaint is normally distributed, with a mean of 9.3 minutes and a standard deviation of 2.5 minutes. What is the probability that for a randomly chosen customer complaint, the amount of time spent resolving the complaint will be: a. Less than 10 minutes? b. Longer than 5 minutes? c. Between 8 and 15 minutes

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