Exercises for the last chapter of a lecture are slightly absurd: exercises always trail the material in the lecture. Thus the exercises of the last chapter never make it to the exercise sheet. We add...

Exercises for the last chapter of a lecture are slightly absurd: exercises always trail the material in the lecture. Thus the exercises of the last chapter never make it to the exercise sheet. We add them here anyway. After all there is nothing wrong with doing absurd things as long as they are harmless and fun.