1. (i) Solve the problem below: 5.47 Compute the image location and magnification of an object 30 cm from the front doublet of the thin-lens combination in Fig. P.5.47. Do the calculation by finding the effect of each lens sepa- rately. Make a sketch of appropriate rays. 15 cm f = 40 cm f2 = -28 cm (ii) In addition, determine the effective focal length of the two-lens system and locate the principal planes