The times per week a student uses a lab computer are normally distributed, with a mean of 6.1 hours and a standard deviation of 1.3 hours. A student is randomly selected. Find the following probabilities. (a) Find the probability that the student uses a lab computer less than 5 hours per week. (b) Find the probability that the student uses a lab computer between 7 and 8 hours per week. (c) Find the probability that the student uses a lab computer more than 9 hours per week.
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