12 Chapter 3. Linear Systems. Exercises section 3.5 page 327

12.1 problem 1
12.2 problem 2
12.3 problem 3
12.4 problem 4
12.5 problem 5
12.6 problem 6
12.7 problem 7
12.8 problem 8
12.9 problem 17
12.10 problem 18
12.11 problem 19
12.12 problem 21(a)
12.13 problem 21(b)
12.14 problem 24