Please choose the correct solution to the question: To zip up pants,

Solution1: button the waist, grab the bottom of the zipper and hold down with one hand, grab the metal handle of the zipper and pull up until zipped.

Solution2: button the waist, grab the top of the zipper and hold down with one hand, grab the metal handle of the zipper and pull down until zipped.

Answer format: solution1/solution2
Answer: solution1