. A convex lens of focal length 25 cm is at a distance of 60 cm from a concave mirror of focal length 20 cm (see figure below). A lightbulb is 80 cm from the lens. (a) Where does the lens form an image of the lightbulb? (b) Where does the mirror form an image of the first image? (c) Where does the lens form the (nal) image of the second image? In