The times for each week student employs a lab computer are normally distributed, with mean of 6.6 hours and standard deviation of 1.4 hours. A student is randomly selected. Determine the following probabilities.
(a) Compute the probability that the student employs a lab computer less than 5 hours per week.
(b) Compute the probability that the student employs a lab computer between 6 and 9 hours per week.
(c) Compute the probability that the student employs a lab computer more than 10 hours per week.