1. Pedrotti 3rd ed., problem 2-18 <br>
2. Pedrotti 3rd ed., problem 2-20<br>
3. Pedrotti 3rd ed., problem 2-24<br>
4. Pedrotti 3rd ed., problem 2-31 <br>
5. Pedrotti 3rd ed., problem 2-33 <br>
6. Pedrotti 3rd ed., problem 2-35<br>