Ah, ok. That's good you can play quite a lot, it does need quite a bit of practice! Your daughter is right to be impressed.

Your arm should get less tired the more you play - I used to struggle to play tunes that were more than a page long, but one of my Grade 8 pieces is 5 pages and I manage fine now.
It's going ok, I think - one of the pieces I'm quite confident about, anyway, but the other two I'm not so sure...I still keep making mistakes. I've definitely got a bit of work to do before March 7th! But my teacher told me I should be fine, and I'm trying to believe her.