Solution

25796

First name
Aleena Rahman, Tiana Ebrahimian, Katie Glover, Lot
School
Nottingham Girls' High School
Country
Age
12

We have found out the code to part 3. To find the code, you have to figure out what the letters represent. The lettersare jumbled up rather than just shifting it or reversing it. This makes the code harder to crack. But there a loads of clues to help you crack it.
Example:
A-E
B-P
C-G
etc.