You need to follow the posting guidelines if you expect help. Follow the thread template and include Relevant Equations and an Attempt at Solution; Without seeing your attempt or at least a description of what you know about what the problem involves, we won't know how to help you. We don't do your homework for you!
Also I might point out that it has been found that phrases like "Very urgent!", and "Due tomorrow!" actually make it less likely that your post will be addressed.