Exercise 1 solution

By hand: EV at the shot's ISO = log2(5.6^2 / (1/125)) = log2(31.36 x 125) = log2(3920) = about 11.94 (2^12 = 4096, so just under 12).
Subtract log2(200/100) = 1: EV100 = about 10.94.
Closest of Chapter 1's categories: between heavy overcast (12) and bright street scenes (8); nearer 12 than 8 by about 1 step. The categories are rough (check).
Add the line ("example", 5.6, 1/125, 200) to shots and run to confirm 10.94.