For the intro: Begin by contextualising the article. This means giving a very short (one or two sentences) explanation of the boat people issue and Rudd's policy.
Then mention where the article comes from and who wrote it, then identify the overall contention of the writer. You may also want to mention the tone the writer uses as well.
For the body paragraphs, what you do is identify the technique you're analysing and quote an example of it from the article. Then explain what the writers intent was in using that technique, and what effect it has on the reader.
In the conclusion, say which techniques were you thought were most effective, and/or which you thought were least effective. Then sum up the overall effectiveness of the article as a persuasive piece, perhaps mentioning the contention again.
That's the basic technique for writing a language analysis. You'll be writing a truckload of them over the next year and a half, so it's good to learn how to do them properly.