At one university, the mean distance commuted to campus by students is 19.0 miles, with a standard.deviation of 5.2 miles. Suppose that the commute distances are normally distributed. Complete the following statements. (a) Approximately7 miles and 24.2 miles. of the students have commute distances between 13.8 (b) Approximately 99.7% of the students have commute distances between O miles and Omiles.