User talk:ACCCGS8
Sorry, I just saw your questions right now. You should post them on our forums if you haven't done so already. The wiki is a useful tool for material preparation; there are plenty of problems and explanations that can be found here, but it is not as good as a tool for discussion. Feel free to ask if you have any other questions. azjps (talk) 20:10, 1 February 2012 (EST)