Follow the instructions on the proposal PDF doc. Since this is a group project, so the second document “Paper for AFS” you have the parts of the two other members of the group. After reading the proposal you’ll understand what you need to write about.
All applicants go through a series of tests that check their level of English and knowledge of formatting styles. The applicant is also required to present a sample of writing to the Evaluation Department. If you wish to find out more about the procedure, check out the whole process.