A kite 100 ft above the ground moves horizontally at a speed of 8 ft/sec. At what rate is the angle between the string and the horizontal changing whe 200ft of string has been let out, i.e., the distance from the kite to the person flying the kite is 200 feet? Is the size of the angle increasing or decreasing? (you may assume the angle is measured from the ground, don't worry about the person's height)