Exercise 2 solution

Diagonal angle on full frame (43.3 mm diagonal):
24 mm  -> 84.1 degrees  -> wide-angle
50 mm  -> 46.8 degrees  -> standard (normal)
85 mm  -> 28.6 degrees  -> medium telephoto
300 mm -> about 8.3 degrees -> super telephoto (the table says "over 300 mm" and "under 8 degrees", so 300 mm is right on the boundary; the groupings are descriptive, not exact)