question #1 Sahih Muslim 738a, Book 6, Hadith 152 : How many rak’ahs did the Prophet Muhammad (ﷺ) typically perform during the night prayer in Ramadan and other months?

The Messenger of Allah (ﷺ) did not observe either in Ramadan or in other months more than eleven rak’ahs (of the night prayer). He (in the first instance) observed four rak’ahs. Ask not about their excellence and their length (i. e. these were matchless in perfection and length). He again observed four rak’ahs, and ask not about their excellence and their length. He would then observe three rak’ahs (of the Witr prayer). ‘A’isha again said: I said: Messenger of Allah, do you sleep before observing the Witr prayer? He said: O ‘A’isha, my eyes sleep but my heart does not sleep.