7. An object is placed 72cm from a 81cm focal length converging lens. Determine the image position, size and orientation? a) analytically b) Using ray diagram. 8. An object is placed 72cm from a 81cm focal length diverging lens. Determine the image position, size and orientation? a) analytically b) Using ray diagram. 9. A light bulb is placed 81cm from a concave mirror having a 81m focal length. Use ray tracing to get an approximate location for the image. Then use the lens equations to calculate (a) the location of the image and (b) its magnification. Solve the problem for convex mirror