Please help me with this

Q1 An object is placed 20.0 cm to the right of a concave mirror with focal length 12.0 cm and 30.0 cm to the left of a converging lens with focal length 10.0 cm, Make a table of three rows, Row-1 , object 20 cm from concave mirror as shown, locate the image created by both the mirror and lens. Row2, object 18 cm from concave mirror, locate the image created by both the mirror and lens. Row-3, object 16 cm from concave mirror, locate the image created by both the mirror and lens. Plot image distance yaxis versus object distance Find the average slope, rate of change of image distance with respect to the object distance I-zoo mrmn cIu-| fl ohm r. J {,- Izncrn I!- mean