This document was written by Mostafa Osama Hussein under the supervision of Mr. Mohamed Salah Omar for Exellance international school. It provides the author and supervisor's names and the school it was written for.

6. By
Mostafa Osama Hussein
Supervised by
Mr. Mohamed Salah Omar
Exellance international school

7. By
Mostafa Osama Hussein
Supervised by
Mr. Mohamed Salah Omar
Exellance international school