Suppose a random sample of 1000 Americans was taken and 246 were found to have blue eyes. a) Determine the 95% confidence interval that contains p, the true population proportion of blue-eyed Americans. (Report your answer as an interval on the number line. i.e., (.264, .367) Round each end to the nearest thousandth.) b) What is the minimum sample size that would be needed to estimate p, the true population proportion, with an error of .02 at a 95% confidence interval