The above was assigned as a text book in a college course. After spending many hours and staring at formulas that did not make any sense, we found out that the book is full of fundamental errors (this fact was confirmed by my Professor). The impression I got from the publisher and the author was that this book has been written for the soul purpose of revenue generation and not for educational purposes. I think the author needs to edit the book one more time (I have the Seventh edition).