?
You want *help* with it, or you want us to do your homework for you? Why don't you tell us what you have already written (I suspect that's nothing at all, but then I'm a cynic) and we'll tell you where you need to work on it.
.
The thing is, these kinds of questions are designed to make *you* think, as well as teaching you research skills. Being spoon fed pat answers here does neither.
.
.