1. Pedrotti 3rd ed., problem 15-1
2. Pedrotti 3rd ed., problem 15-2
2. Pedrotti 3rd ed., problem 15-4
4. Pedrotti 3rd ed., problem 15-8
5. Pedrotti 3rd ed., problem 15-11
6. Pedrotti 3rd ed., problem 15-13
7. Pedrotti 3rd ed., problem 15-24
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