question #1 Sahih Muslim 736a, Book 6, Hadith 147 : How many rak’ahs did the Prophet Muhammad (ﷺ) pray at night and how was the Witr prayer performed?

‘A’isha reported that the Messenger of Allah (ﷺ) used to pray eleven rak’ahs at night, observing the Witr with a single rak’ah, and when he had finished them, he lay down on his right side, till the Mu’adhdhin came to him and he (the Holy Prophet) then observed two short rak’ahs (of Sunan of the dawn prayer).