The narrow sense heritability for cholesterol content in Munch Beans is 0.8. To increase cholesterol from 200 to 240, what should be the level in the Munch Beans selected to cause the change

In science class maria observed a white color and cut flowers she sees that the petals turn red when the flowers sitting in a vase that has red colored water she forms a hypothesis that the color reaches the flower through the stem what should we do to confirm the hypothesis