Assume that a sample is used to estimate a population proportion ,0. Find the 90% confidence interval for a sample of size 162 with 15% successes. a. Enter your answer as an open-interval (129., parentheses) using decimals (not percents) accurate to three decimal places. Confidence interval = b. Express the same answer as a tri-linear inequality using decimals (not percents) accurate to three decimal places. c. Express the same answer using the point estimate and margin of error. Give your answers as decimals, to three places. H: i :1