I managed to smoke out of something from a `sample' notes that I downloaded off the web. Although I do not really understand what the notes ractually mean, i was desperate enough to write down whatever that earns me points. A good comfort to me, is that the last part of the question (out of 4 parts) is not found in the 'sample' solution, so I had to smoke out something, but based on results from other parts. I was prepared to write down in the paper that I got the idea from the web. And I have prepared the answer in case I am asked. Since I do not know the answer, I can only search the web, acquire whatever knowledge I need in order to finish the assignment. Obviously, am I expected to think of the solution out of the nowhere, ain't I? But the worst case is that I'm not awarded mark, that's still fine with me, since I do not know how to do anyway, I will not get the mark. =( Mr BLOG