While praying behind Imam it is necessary to read Surah fathia in all rakat.Tell me about all rakat in 3 and 4 rakat also
Wa’alaykum as Salam wa rahmatullahi wa Barakatuhu,
When praying behind an Imam, you do not have to recite Surah al-Fatiha in any Rak’ah, irrespective whether the Imam recites audibly or softly. You should remain silent in the third and fourth Rakats, as well as in all 4 Rakats of Zuhr and ‘Asr.
And Allaah Ta’aala knows best
Ismail Moosa (Mufti)