You should probably wait for someone else because I’m not sure about the answer plz don’t get mad at me ;)
He (Which should be El, but anyway) visto is not correct, because you are talking about someone else. Yo Tengo is correct, because you are staying that you have seen.
The students of the UNAM do not live (live) a very large university. 74 study courses. in student residences. the biggest (biggest) city in Latin America. 2. Mexico, D.F. It is a very big university. 74 study courses. in student residences. the biggest (biggest) city in Latin America. 3. The UNAM is a very large university. 74 study courses. in student residences. the biggest (biggest) city in Latin America. 4. The UNAM offers a very large university. 74 study courses. in student residences. the biggest (biggest) city in Latin America.
I translated I hope it was somewhat helpful to understand.
