Don't Know How to Do !!!

I am still stuck with 306 seminar 5 Qn 3. Am doing my readings so that i can do that question. Although it is the 2nd time i am doing it, it's as if it's the 1st time i really try to understand what is going on. I wouldn't dare to take it for granted that i know everything. For, if i knew how to do everything, i don't think i would be in this class right now. Treat me as a 1st timer....I have my doubts too....