1) The Prophet (s) had 3 boys and 1 daughter (or 4 daughters according to a different view)
2) Qasim, Abdullah, Ibrahim, Fatima
3) Fatima (as)
4) There is a difference of opinion about this issue whether the other girls were daughters of the prophet or if they were his foster children from Kahdija’s sister who passed away.
5) There is no general consensus but differing views according to each individuals research.