The distance a student lives (in miles) from their probability classroom is approximately normally distributed with a mean of 3 miles and a standard deviation of 1.2 miles.
a. How far away do the closest 10% of students live?
b. What is the probability that a student will live too close to get a parking permit (less than 1 mile away)?
c. What is the probability that a student will live further away than 5 miles or less than 1 mile away?