Please choose the correct solution to the question: Attach a large metal nail through the bottom of a wooden disc.

Solution1: Drill a hole in the middle of a wooden disc same size as the diameter of the nail. Drive the nail through it from the top, and glue the head of the nail on the disc from the side of the disc.

Solution2: Drill a hole in the middle of a wooden disc same size as the diameter of the nail. Drive the nail through it from the top, and glue the head of the nail on the disc from both top and bottom of the disc.

Answer format: solution1/solution2