Riding in an elevator moving upward with constant speed, you begin a game of darts.
(a) Do you have to aim your darts higher than, lower than, or the same as when you play darts on solid ground?
(b) Choose the best explanation from among the following:
I. The elevator rises during the time it takes for the dart to travel to the dartboard.
II. The elevator moves with constant velocity. Therefore, Newton's laws apply within the elevator in the same way as on the ground.
III. You have to aim lower to compensate for the upward speed of the elevator.