You should work all of the assigned questions, exercises, and problems. You never know when you might see those questions again. Lastly, if you need help, ASK! Come by my office hours, use eMail, ...our doors are always open.
Course Homework: The homework assignments will be posted as the semester goes along. The problems posted here are the ones that will be collected in the various classes and graded in every class section and by every instructor. There are more practice homework problems contained within the 101 textbook that should also be worked, plus the instructors will often assign additional problems or work problems in class.