What fraction of all students would have breathing rates in the following intervals?

9. [0/3 Points] DETAILS PREVIOUS ANSWERS MENDSTAT15 2.3.020.MI. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER Breathing rates for humans can be as low as 4 breaths per minute or as high as 70 or 75 for a person doing strenuous exercise. Suppose that the resting breathing rates for college-age students have a distribution that is mound-shaped, with a mean of 14 and a standard deviation of 1.3 breaths per minute. What fraction of all students would have breathing rates in the following intervals? (a) 12.7 to 15.3 breaths per minute X (b) 11.4 to 16.6 breaths per minute X (c) more than 17.9 or less than 10.1 breaths per minute X