#12, show stepsplease

12. The mirrors in Fig. 30.16 make a 60 angle. A light ray enters parallel to the symmetry axis, as shown. (a) How many reflect tions does it make? (b) Where and in what direction does it exit the mirror system? Exercise 12 60 Exercise 14 FIGURE 30.16 Exercises 12 and 14 and Problem 28