(a) Determine the ray-transfer matrix for an optical system made of a thin convex lens of focal length f and a thin concave lens of focal length - f separated by a distance f. (hint: B=0 in the matrix).
(b) Determine the magnification of the image when the object is placed at (i) d1=3f, (ii) d1=2f, and (iii) d1=f.