Ace Heating and Air Conditioning Service finds that the amount of time a repairman needs to fix a furnace is uniformly distributed between 1.5 and four hours. Let x = the time needed to fix a furnace. Then x~U (1.5, 4). a. Find the probability that a randomly selected furnace repair requires more than two hours. b. Find the probability that a randomly selected furnace repair requires less than three hours.

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