Write out all calculations neatly in order, on separate lined paper, line by line without skipping any steps in the logic. The process of writing is important to focus your attention on the reasoning. Check the answers, which are posted on this website, and then redo any problem you missed to be sure you can do it correctly. If you wish, you may work collaboratively with classmates. The course Listserv list is a good place to ask and answer questions about the homework.
Teamwork can be beneficial, if all parties contribute.
Whenever you have a question or don't understand something, please ask. If you discover an error, or if information is missing that should be provided, please let me know. These Supplemental Exercises will not be turned in or graded. I do expect you to do them in a timely fashion as assigned. They should form part of your systematic studying for this course each week.