The population of Metroville was 4,187,463 on June 30,2013 . During the period of January 1,2013 to December 31, 2013, a total of 6,367 city residents were infected with HIV. During the same year, 968 new cases of HIV were reported. Calculate the incidence per 100,000 population and round to the nearest tenth-decimal point. a. 22.2 per 100,000 b. 23.1 per 100,000 c. 24.2 per 100,000 d. 25.1 per 100,000