This problem has been solved! see the answeran 80-mm-focal-length lens is used to focus an image on the film ofa camera. the maximum distance allowed between the lens andthe film plane is 120mm.(a) how far ahead of the film should the lens be if the object tobe photographed is 10.0m away? (b) 3.0m away? (c) 1.0m away? (d) what is the closest object this lens could photographsharply?