Please choose the correct solution to the question: How do you solder two coins together?

Solution1: Place coins where you would like them to be joined and apply glue to both sides in order to make them adhere to each other.  Cool down quickly with a water bottle.

Solution2: Place coins where you would like them to be joined and apply heat to both sides in order to make them adhere to each other.  Cool down quickly with a water bottle.

Answer format: solution1/solution2
Answer: solution2