An object is placed 30.0 cm to the left of a double convex l…

An object is placed 30.0 cm to the left of a double convex lens whose focal points are 20.5 cm from the lens. A double concave lens, whose focal points are 42.5 cm from the lens, is placed 30.0 cm to the right of the first lens. (a) What is the distance between the first lens and the first image from the first lens? (b) What is the distance between the original object and the final image? (c) If the final image is 15.0 cm in height, what is the height of the original object? (d) Is the final image real or virtual, upright or inverted, larger or smaller?