Please choose the correct solution to the question: To flip a pancake in a pan,

Solution1: using a spatula, once the pancake is bubbling up from the bottom, slide under the pancake and flip it over to the other side.

Solution2: using a spatula, once the pancake has cooked in the pan for fifteen seconds, slide under the pancake and flip it over to the other side.

Answer format: solution1/solution2