A simple camera telephoto lens consists of two lenses. The objective lens has a focal length f1 = 38.8 cm. Precisely 35.7 cm behind this lens is a concave lens with a focal length f2 = -10.3 cm. The object to be photographed is 3.97 m in front of the objective lens.
a) How far behind the concave lens should the film be placed?
b) What is the linear magnification of this lens combination?