hi everyone

this is a question for a school assignment that has been puzzling me and my friends for awhile. It's getting to the point where we think it's impossible! It's a bit hard to describe so I drew it up in paint, this is the link to the picture.

http://img226.imageshack.us/img226/1728/question9ne.gif

I would really appreciate it if you had a look at it and gave me your thoughts?

Thanks heaps in advance!
njlw