Read Chapter 3 and 4 of Fraser, Bernhardt, Jewkes and Tajima;
do Problems 3.14, 3.19, 3.34, 3.42, 4.1, 4.9, 4.12, and 4.17.
For this week's assignment, I'd like you to evaluate the numerical
values of the (x/y, i, N) factors used in your calculations,
though you should defer this evaluation to the last stage.