Please choose the correct solution to the question: To make a pastry bag,

Solution1: use a clean kitchen towel, cut a round hole in the center with scissors, and insert the piping tip through the hole and screw on the end cap.

Solution2: use a clean kitchen towel, cut a round hole in the center with a knife, and insert the piping tip through the hole and screw on the end cap.

Answer format: solution1/solution2
Answer: solution1