Please choose the correct solution to the question: How to determine where a puncture is in a bicycle tire tube?

Solution1: Remove the tube and tire from the bicycle and pump up the tube then submerge in water and listen for the sound of bubbles to isolate the puncture

Solution2: Remove the tube from the tire and pump up the tube then submerge lightly in water and look where the bubbles form to isolate the puncture

Answer format: solution1/solution2