Which list places events in the correct order?
1. Muhammad dies, Abu Bakr unifies followers, Arab Muslims defeat Byzantines and Persians, Abbasid caliphate established, Umayyad caliphate established
2. Arab Muslims defeat Byzantines and Persians, Muhammad dies, Abu Bakr unifies followers, Abbasid caliphate established, Umayyad caliphate established
3. Abu Bakr unifies followers, Muhammad dies, Umayyad caliphate established, Arab Muslims defeat Byzantines and Persians, Abbasid caliphate established
4. Muhammad dies, Abu Bakr unifies followers, Arab Muslims defeat Byzantines and Persians, Umayyad caliphate established, Abbasid caliphate established
Please help me, I'm stuck.