Consider a combination of a thin positive lens and a concave mirror as illustrated below. For the object located between the lens and the mirror, two real images with the same size is formed at the same position on the left side of the lens. The magnification of both images is 1.5, with one image upright and the other upside down. When the focal length (fi) of the lens is 10 cm and the distance between the lens and mirror is 40 cm, find the focal length (f2) of the mirror. Image fi Thin lens Object :) S2 Concave mirror