The Bureau of Labor Statistics' American Time Use Survey showed that the amount of time spent using a computer for leisure varied greatly by age. Individuals age 75 and over averaged 0.20 hour (12 minutes) per day using a computer for leisure. Individuals ages 15 to 19 spend 1.2 hour per day using a computer for leisure. If these times follow an exponential distribution, find the proportion of each group that spends:

a. Less than 12 minutes per day using a computer for leisure. (Round your answers to 4 decimal places.)

Age 75 and over=

Age 15 to 19=

b. More than 2 hours. (Round your answers to 4 decimal places.)

Age 75 and over=

Age 15 to 19=

c. Between 24 minutes and 72 minutes using a computer for leisure. (Round your answers to 4 decimal places.)

Age 75 and over=

Age 15 to 19=

d. Find the 26th percentile. Seventy-four percent spend more than what amount of time? (Round your answers to 2 decimal places.)

Amount of time for individual ages 75 and over

Amount of time for individual ages 15 to 19