A fortune teller's glass ball is 10 cm in diameter. Her secreting is placed 6 m from the edge of the ball.
1. The crystal ball is removed and a thin lens is placed where the center of the ball had been. If the image is still in the same position, what is the focal length of the lens?
2. An image of the ring appears on the opposite side of the glass ball. How far is the image from the center of the ball?