in a population of 100,000 people, 10,000 are infected with a virus. after a person becomes infected and then recovers, the person is immune (cannot become infected again). of the people who are infected, 2% will die each year and the others will recover. of the people who have never been infected, 25% will become infected each year. how many people will be infected in 4 years? (round your answer to the nearest whole number.)