Introduction to Proof and Problem Solving

2.9: 6
2.10: 8
3.2: 6
3.3: 4
3.3: 10
3.4: 4
3.4: 8
3.5: 10
3.5: 12

For all the exercises 3.2 (6) through 3.5 (12) you have to justify your answer.

Use LaTeX for all parts. Each of the 9 problems on a separate page (use command \newpage in LaTeX). When uploading, indicate which problem is on which page.