22 Chapter 4, Linear Systems. Exercises page 237

 22.1 problem 4(a)
 22.2 problem 4(b)
 22.3 problem 4(c)
 22.4 problem 4(d)
 22.5 problem 4(e)
 22.6 problem 4(f)
 22.7 problem 4(g)
 22.8 problem 4(h)
 22.9 problem 5
 22.10 problem 6