Please choose the correct answer to the question: An ice cube is placed in a pan. The pan is placed over an open flame. Which change will most likely happen over time?

Answer1: The ice changes to a liquid and back to a solid. Answer2: The ice changes to a liquid then to a gas. Answer3: The ice changes to a gas and back to a solid. Answer4: The ice changes to a gas then to a liquid.

Answer format: answer1/answer2/answer3/answer4