A political researcher takes a survey of 300 randomly selected registered voters in Atlanta, and each person was asked who they plan on voting for in the 2020 mayoral election. 101 said they plan on voting for Candidate A, 184 said they plan on voting for Candidate B, and 15 were unsure or plan to vote for another candidate. In question 8, the political researcher estimated p, the population proportion of all registered voters in Atlanta who plan to vote for Candidate A, with a 95% confidence interval. The researcher now wants to estimate p with a margin of error of 3%. What is the minimum sample size needed