A thin plastic lens whose focal length is −15cm is placed on an optical bench. An object is positioned 25cm to the left of the lens along the principal axis.
(1) Determine the image distance produced by the lens.
(2) Calculate the linear magnification of the image.
(3) Using the numerical results, indicate whether the image is real or virtual, upright or inverted, and whether it is enlarged, reduced, or the same size as the object. Explain your reasoning briefly.