A person spear-fishing from a boat sees a stationary fish a few meters away in a direction about 30° below the horizontal. The index of refraction of the water is 1.34. Assume the dense spear does not change direction when it enters the water. To spear the fish, the person should
(a) aim above where he sees the fish;
(b) aim precisely at the fish; or
(c) aim below the fish?