Two converging lenses having focal lengths of 11.0 cm and 21.0 cm are placed 50 cm apart, as shown in Figure P23. The final image is to be located...

Two converging lenses having focal lengths of 11.0 cm and 21.0 cm are placed 50 cm apart, as shown in Figure P23.44. The final image is to be located between the lenses, at the position indicated. How far to the left of the first lens should the object be positioned?