Please choose the correct solution to the question: To make a color of oil paint darker,

Solution1: squeeze equal amounts of the original color and a lighter color onto a palette, and mix them with a palette knife blade, adding more of either color to adjust the shade.

Solution2: squeeze equal amounts of the original color and a darker color onto a palette, and mix them with a palette knife blade, adding more of either color to adjust the shade.

Answer format: solution1/solution2
Answer: solution2