90.29 Chapter 6. Discontinuous Functions and the Laplace Transform. Exercises at page 449

90.29.1 problem 9
90.29.2 problem 10
90.29.3 problem 12
90.29.4 problem 14
90.29.5 problem 22
90.29.6 problem 23
90.29.7 problem 24
90.29.8 problem 25