1. A light ray leaves point A in the figure, reflects from the mirror, and reaches point B. How far below the top edge does the ray strike the mirror?

2. It's nighttime, and you've dropped your goggles into a swimming pool that is 4.5m deep. If you hold a laser pointer 1.4m directly above the edge of the pool, you can illuminate the goggles if the laser beam enters the water 2.8m from the edge. How far are the goggles from the edge of the pool?