In the Ski Rental Problem suppose the ski rental cost is A dollars per day, but the ski purchasing cost is B dollars, where AB. Then a competitive strategy is and the competitiveness ratio of this strategy is ca. Then a competitive strategy is: keep renting every day if B 2, the following is a competitive deterministic on-line strategy for the K-Server Problem: a. Balanced b. None of the other choices. c. Harmonic d. Work Function. e. Greedy