A public opinion poll is taken a week prior to the election of the state governor. There are two candidates, A and B. A random sample is taken among likely voters, and among those people polled, 724 prefer Candidate A, and 831 prefer Candidate B. a) Find the 95% confidence interval for the percentage of support of Candidate A among likely voters. b) Find the 95% confidence interval for the percentage of support of Candidate B among likely voters. c) Is the difference between the two candidates statistically significant at this confidence level? Explain.