Presentation exercises are marked with a *.
Section 7.1: 1,4,7,10*,12,15,18,21,24,32,36,47,50,55,58*.
Section 7.2 : Exercises 1,4,7,10*,13,17,36,38,40*.
Section 7.3: Exercises 6,14, 21*, 22,23, 34*, 35*, 36*, 37.