The Bureau of Labor Statistics’ American Time Use Survey showed that the amount of time

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 .25 hour (15 minutes) per day using a computer for leisure. Individuals ages 15 to 19 spend .9 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 14 minutes per day using a computer for leisure. (Round your answers to 4 decimal places
(b) More than two hours
(c) Between 28 minutes and 84 minutes using a computer for leisure
(d) Find the 25th percentile. Seventy five percent spend more than what amount of time? (Round your answers to 2 decimal places.)