The one-way commuting times from home to work for all employees working at a large company have a bell-shaped curve with a mean of 33 minutes and a standard deviation of 8 minutes. Using the empirical rule, find the approximate percentages of the employees at this company who have one-way commuting times in the following intervals.

a. 9 to 57 minutes

%

b. 25 to 41 minutes

%

c. 17 to 49 minutes

%