The first basic exercise (scale)
Etudes of the second technique
Third polyphonic music
The fourth song
If you are young and you play well, you should have no problem. Level 5 is still very simple after all, so don't be nervous.
This year, the test center will draw lots to decide the test order. There should be two examiners in the examination room. You can listen to half of each song, but it's hard to say. Just play normally.
Pay attention to manners, appearance and take your time. Don't let the examiner think you are nervous, or your nervous hands will start to shake, which will be miserable.