12. The 2010 U.S. census listed the following populations for these Arizona cities: City Population Casa Grande 18.571 Gila Bend 1.922 Jerome 444 Phoenix 1,445,632 Tempe 161,719 Suppose that you are interested in estimating the percentage of persons who have been immunized against measles in each city and can take an SRS of persons. What should your sample size be in each of the 5 cities if you want the estimate from each city to have margin of error of 4 percentage points