Ray Optics and Optical Instruments Part 2

Given a thin convex lens (refractive index µ2 ), kept in a liquid (refractive index µ1,µ1<µ2 ) having radii of curvatures |R1| and |R2|. Its second surface is silver polished. Where should an object be placed on the optic axis so that a real and inverted image is formed at the same place?