Salah of the latecomer

Q 1: If a person catches up with the second Rak`ah behind the Imam, should he recite a short Surah in the third Rak`ah or not?

A: If a latecomer catches up with the second Rak`ah, it will be the first one for them, and they can recite a Surah or some Ayahs in the following Rak`ah, fewer than what was recited in the first one, this should be done after reciting Al-Fatihah.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.