Please choose the correct answer to the question: An engineer must calculate the potential energy of a roller coaster car at the top of an incline. Which information would best help the engineer determine the potential energy of the car?

Answer1: the distance the roller coaster car must travel Answer2: the mass of the roller coaster car at full capacity Answer3: the average weight of an empty roller coaster car Answer4: the direction that the roller coaster car is traveling

Answer format: answer1/answer2/answer3/answer4