Please choose the correct answer to the question: Rachel purchased a kit for making a skateboard ramp. Which of the following is most important to have for putting the ramp together?

Answer1: a picture showing the colors of different ramp parts Answer2: a diagram showing some ways to use the ramp Answer3: a list of prices for other available kits Answer4: a set of instructions for the kit materials

Answer format: answer1/answer2/answer3/answer4
Answer: answer4