Please choose the correct solution to the question: To make a curved surface using a flat EVA foam sheet.

Solution1: Take the flat sheet of EVA foam and heat it using a hair dryer. Mold over a rounded shape while the sheet is still hot.

Solution2: Take the flat sheet of EVA foam and heat it using a hair dryer. Mold over a rounded shape after the sheet cools.

Answer format: solution1/solution2