For problem i, p[i].ps is to read with ghostview (or print), and p[i].pdf is to read with adobe acroread. Most browsers, suitably configured, will automatically launch either viewer when you click.

Problem 1: p1.ps or p1.pdf
Problem 2: p2.ps or p2.pdf
Problem 3: p3.ps or p3.pdf
Problem 4: p4.ps or p4.pdf
Problem 5: p5.ps or p5.pdf
Problem 6: p6.ps or p6.pdf
Problem 7: p7.ps or p7.pdf
Problem 8:
Problem 9: p9.ps
Problem 10:
Problem 11:
Problem 12: p12.ps or p12.pdf
Problem 13:
Problem 14: p14.ps or p14.pdf
Problem 15:
Problem 16: p16.ps
Problem 17(32.1): p17.ps or p17a.pdf
Problem 17(32.2): p17.txt
Problem 18: No model given. Too many variants.