Remembering in ruku' that he forgot to recite al-Fatihah: Is his ruku' valid?

Question:
May Allah reward you. In his final question, the brother Ibn Husayn ibn Ali al-Husayn says: If a person is praying in the first or middle rak'ah and is standing reciting, but he forgot to recite Surat al-Fatihah and recited another surah, and he did not remember until after he had bowed, what should he do if he remembers that? Please inform us, may Allah have mercy on you.

Answer:
Reciting al-Fatihah is a pillar of the prayer for the imam and for the one praying alone. If he forgets it, his rak'ah is not valid; this rak'ah is not valid. Even if he bows while having not recited al-Fatihah, forgetting it, and then remembers, he must stand up. This is because this bowing is not valid. He stands up, recites al-Fatihah, and then recites whatever is easy for him of the Qur'an in the first two rak'ahs. He performs the prostration for forgetfulness before the taslim. Yes?