8.8 Section 5.2, second order linear equations. Page 311

8.8.1 problem 21
8.8.2 problem 22
8.8.3 problem 23
8.8.4 problem 24
8.8.5 problem 26(a.1)
8.8.6 problem 26(a.2)
8.8.7 problem 26(b)