A thin converging lens L₁ of focal length 20 cm and a thin diverging lens L₂ of focal length 30 cm (magnitude) are placed coaxially 40 cm apart, with L₂ to the right of L₁. An object is placed on the axis 30 cm to the left of L₁, and light travels from left to right. Using the Cartesian sign convention, where is the final image formed?