A university’s campus has 20,000 computers with cathode-ray tube monitors that are powered up even when the computer is not being used. This type of monitor is relatively inefficient, and it draws more power than a flat panel display.

(a) If each cathode-ray tube monitor draws 0.1 kW of power over the course of a year, how much energy has been consumed? Express your answer in the conventional units of kW ∙ h for electricity.

(b) At the cost of 12¢ per kW ∙ h, how much does it cost the university each year to keep these monitors powered up?

(c) On average, a computer monitor that has the automatic sleep feature enabled will consume 72% less energy than one that is continually powered. What is the cost savings associated with enabling this feature on all of the university’s computers?