A crow is flying and carrying a walnut at a height of 25 feet. The crow is ready to drop the walnut to the ground, but a second crow lands directly below him. For the flying crow to be able to dive to the broken walnut before the second crow can steal it, the walnut must hit the ground before the second crow can fly to its landing spot. At the same time, the walnut must fall far enough to break when it lands. The flying crow identifies several different drop spots. There is a 9-foot tall shed with a flat roof which is 15 feet to the right of the second crow. A balcony that is 16 feet high sits 20 feet in front of the second crow. Finally, a flat garage roof that is 21 feet high sits 20 feet behind the second crow. The diagram illustrates the view of the flying crow.