Some interesting files that can help you to tackle the problems in the book:
A list of new problems (class-tested in homeworks or mid-terms and finals) is included. Instructors are encouraged to submit their own favored problems, so that a richer set of exciting problems becomes available to all of us. Solutions can be requested by e-mail (instructors only, sorry).
Solutions to these tests are only available upon request (by instructors) and are not complete at present.