After Muhammad's death in 632 CE, his friend Abu Bakr was named caliph and ruler of the Islamic community, or Ummah. Sunni Muslims believe that Abu Bakr was the proper successor, while Shi'a Muslims believe that Ali should have succeed Muhammad as caliph.
The Rashidun Caliphate (632–661) was led by Abu Bakr, then by Umar ibn Khattab as the second caliph, Uthman Ibn Affan as the third caliph, and Ali as the fourth caliph.
The agency that influences the<span> electrical power production of the area that is specified by the question given would be the National Labor Relations Board or most commonly known as the NLRB. In addition, the primary roles of the NLRB is to regulate and oversee the employer and labor union relations.</span>