The objective lens has a focal length f1 = +41. Precisely 35.3 cm behind this lens is a concave lens with a focal length f2 = -14. The object to be...

The objective lens has a focal length f1 = +41.6 cm. Precisely 35.3 cm behind this lens is a concave lens with a focal length f2 = -14.1 cm. The object to be photographed is 3.89 m in front of the objective lens. How far behind the concave lens should the film be placed?