90.26 Chapter 6. Discontinuous Functions and the Laplace Transform. Exercises at page 379

90.26.1 problem 17 (a)
90.26.2 problem 21 (a)
90.26.3 problem 25
90.26.4 problem 26
90.26.5 problem 27
90.26.6 problem 28
90.26.7 problem 29
90.26.8 problem 30
90.26.9 problem 33