The commute time to work in the U.S. has a bell shaped distribution with a population mean of 24.4 minutes and a population standard deviation of 6.5 minutes. What proportion of the population has a commute time:

a) between 11.4 minutes and 37.4 minutes? (1 pt)

b) less than 11.4 minutes?(1 pt)

c) greater than 37.4 minutes?(1 pt)