On Wednesday at 9 p. m., Winston went diving. Near the beach, the ocean's surface was at an elevation of -2.5. During his deepest dive, Winston reached an elevation that was 20 1/5 times the elevation of the of the oceans surface. What elevation did winston reach during his deepest dive? Part E: While diving, Winston stopped at a point located halfway between his deepest dive and the ocean's surface. At what elevation was Winston when he stopped halfway? No links pls, and only answer if you know the answer.