bebi,
Don't even worry about it at all. They pretty much wanna know if you can write.. that your writing matches your essay on AADSAS. The topics are real easy, and most of the peeps at my interview wrote mabye 4 or 5 sentences since we were all running out of time. There was also no 5 minute presentation, so don't fret. It's a real relaxing interview.
Best of luck.