Romeo tosses a pebble at Juliet's window to wake her. Unfortunately, he throws too large a pebble too fast. Just before crashing through the glass, the pebble is moving horizontally, having traveled a horizontal distance x and a vertical distance y as a projectile. Find the magnitude of the pebble's velocity as it leaves Romeo's hand. Find the direction of the pebble's velocity (angle above the horizontal) as it leaves Romeo's hand. The answers need to be expressed in x y and g. Any ideas?