Of the drivers who stop at a gas station, 89% purchase gasoline, and 6% purchase both gasoline and oil. A total of 9% purchase oil. Answer the questions below. (If necessary, consult a list of formulas.) (a) What is the probability that a driver purchases oil, given that he or she purchases gasoline? Round your answer to 2 decimal places. X 5 ? (b) What is the probability that a driver purchases gasoline, given that he or she purchases oil? Round your answer to 2 decimal places. 5