Two converging lenses are placed 30.5 apart. The focal length of the lens on the right is 15.0 , and the focal length of the lens on the left is 10.5 . An object is placed to the left of the 10.5 focal-length lens. A final image from both lenses is inverted and located halfway between the two lenses. How far to the left of the 10.5 focal-length lens is the original object?