A kingfisher dives into a lake and resurfaces 6 meters later. The underwater path of the bird is described by a parabola of y=0.5x^2-3x, where x is the horizontal distance the bird swims and y is the bird's depth underwater. Both measurements are in meters. What is the total horizontal distance that the bird swims and what is the greatest depth that the bird reaches? At what distance does it reach this depth?