Quiz #12 Question 2 on pg 408

This problem was the quiz question for last week Quiz #12 Question 2 on pg 408. Thanks Lorenzo for reminding me. I didn't bring the book with me to my Mom's funeral. (I brought Henry Kissinger's new book instead.) But don't tell that to my brother Chris. Sorry I will miss class today but we don't fly from Philadelphia until this evening. Please have everyone do problems from chapter 8 and help one another get ready for the test next week. Does anyone feel comfortable working on chapter 9?