Please choose the correct solution to the question: To feed the sourdough starter,

Solution1: Remove all but one tablespoon starter from its jar, add 1/3 cup water and 1/3 cup soap, and stir with a spoon.

Solution2: Remove all but one tablespoon starter from its jar, add 1/3 cup water and 1/3 cup flour, and stir with a spoon.

Answer format: solution1/solution2