question #3 Sahih al-Bukhari 825, Book 10, Hadith 219 : What are the specific instances during prayer when Takbir should be pronounced aloud?

Abu Sa`id led us in the prayer and said the Takbir aloud on arising from the prostration, and on
prostrating, on rising again, and on getting up from the second rak`a. Abu Sa`id said, “I saw the
Prophet doing the same.”