The times for the mile run of a large group of male college students are approximately Normal with mean 7.01 minutes and standard deviation 0.79 minutes. Use the 68-95-99.7 rule to answer the following questions. (Start by making a sketch of the density curve you can use to mark areas on.)

(a) What range of times covers the middle 68% of this distribution?

(b) What percent of these men run a mile in more than 8.59 minutes?