The times per week a student uses a lab computer are normallydistributed, with a mean of 5.9

5.9 hours and a standard deviation of 1.5

1.5 hours. A student is randomly selected. Find the following probabilities.

(a) Find the probability that the student uses a lab computer less than 3

3 hours per week.

(b) Find the probability that the student uses a lab computer between 6

6 and 8

8 hours per week.

(c) Find the probability that the student uses a lab computer more than 9

9 hours per week.