http://www.mathhelpforum.com/math-he...-question.html and you still haven't shown us any work. i'm closing this thread.
Moderator edit: @ OP: Do these ones in one of the ways explained in the thread whose link is given above.
I am re-opening the thread under the following condition:
I only want a reply from the OP - showing her best attempt at these questions and stating where the problem is if help is still needed.