Final answer:
To provide an accurate answer, please provide the correct equations and specific details of the problem for each part of example 2.18 that you need assistance with.
Step-by-step explanation:
The student asked for help solving parts a), b), and c) of example 2.18 in the book using the Matlab toolbox. However, the provided equation and expressions seem to be unrelated to the example mentioned. To provide an accurate answer, please provide the correct equations and specific details of the problem for each part of example 2.18 that you need assistance with.