Hi senmath:
You accidentally posted your question at the end of somebody else's discussion.
Please go to one of the boards' index pages, and read the post titled, "Read Before Posting".
Then, when you're ready to tell us about a specific exercise, click on the index page's [NEWTOPIC] button, to start your own discussion.
The more information that you provide us about your situation, the better responses you will get. At a minimum, please include the following.
(1) The complete exercise, including all instructions given to you
(2) Some statement(s) about what you already know, or what your reasoning is
(3) Any work that you're able to try (even if you think it's wrong)
Remember, specific questions are best. Welcome to the boards.