PLEASE ANSWER After the death of the Prophet Muhammed, what did sunni did

Eventually the Sunni majority (named for sunna, or tradition) won out, and chose Muhammad's close friend Abu Bakr to become the first caliph, or leader, of the Islamic community. ... Within the century after Muhammad's death, his followers had built an empire that stretched from Central Asia to Spain.

I hope this makes sense and helps

Since wxyz is 4, halfof that would be 2.