57.18 Chapter 4, Linear Systems. Exercises page 190

57.18.1 problem 2(a)
57.18.2 problem 2(b)
57.18.3 problem 2(c)
57.18.4 problem 2(d)
57.18.5 problem 3(a)
57.18.6 problem 3(b)
57.18.7 problem 3(c)
57.18.8 problem 3(d)