Witr Procedure
All of the methods asked in the question are valid . As per the verbal or practical corroboration of the Prophet (sws), the various ways in which this prayer ( Tahajjud Salah ) was offered are the following: 1 . After offering the prayer in groups of two rakat, it should be ended with the salam, and then one more rakat should be offered as witr. ( Source : https://sunnah.com/bukhari:992 AND https://sunnah.com/bukhari:1137 AND https://sunnah.com/muslim:749a AND https://sunnah.com/muslim:749f AND https://sunnah.com/muslim:736a AND https://sunnah.com/muslim:736b-c ) 2 . After offering the prayer in groups of two rakat, it should be ended with the salam, and then five rakat should be offered in a manner that one does qadah in the last rakat only. ( Source : https://sunnah.com/muslim:737a , AND https://sunnah.com/abudawud:1338 AND https://sunnah.com/abudawud:1358 AND https://sunnah.com/abudawud:1359 ) 3 . After offering the prayer in groups of four rakat, it should be ended with the salam, and then three rakat should be offered consecutively with the qadah being done only in the last rakat and then the salam should be said. ( Source : https://sunnah.com/muslim:738a AND https://sunnah.com/bukhari:1147 ) 4 . After consecutively praying two, four, six or eight rakat without the qadah, which should be done in the last rakat, one rakat should be offered standing up after the qadah without saying the salam and then after the qadah the salam should be said. ( Source : https://sunnah.com/muslim:746a ) ___________ Please also refer to the video below from 7:55 to 11:45 https://youtu.be/rFaxg4JZzWU?si=-QbZHttnxZT7rcxy&t=475