Introduction to proof and problem solving

1.8: 6(a), 6(b),

2.1: 6, 14;

2.2: 8;

2.3: 2;

2.4: 4;

2.5: 4, 8, 10;

2.6: 2, 10 (justify your answer);

2.7: 6 (justify your answer).

Use LaTeX for all parts. Each of the 13 problems on a separate page (use command newpage in LaTeX). When uploading, indicate which problem is on which page.