A lighted candle is placed 45.0 cm in front of a diverging lens. The light passes through the diverging lens and on to a converging lens of focal length 10.0 cm that is 6.0 cm from the diverging lens. The final image is real, inverted, and 36.0 cm beyond the converging lens. Find the focal length of the diverging lens. Answer is in cm, please help!