MONROVIA, Liberia — Election officials in Liberia on Monday formally declared Joseph Boakai the president-elect, three days after incumbent George Weah conceded defeat based on the runoff vote’s provisional results. According to the National Elections Commission, Boakai won with 50.64% of the second round balloting while Weah took 49.36%. Weah, a former international soccer star, has earned praise in the …