Peruse the lectures on Dr. Moshell's page. In particular,
look through pages 5 through 9 in Lecture 1, pages 1 to 3 and 6 to 9
in Lecture 2. For Friday, I would like you to answer question 2 in
Lecture 1, and questions 1 and 3 in Lecture 2. The lectures are included
in the link below. Dr. Moshell's Lectures
Class Lectures, First Semester