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