According to a government agency, 15.2% of the population of a certain country smoked in 2016. In 2018, a random sample of 636 oitizans of that country was selected, 87 of whom smoked. Complete parts a through a. Construct a 90%% confidence interval to estimate the actual proportion of people who smoked in the country in 2018. The confidence interval has a lower limit of .114 and an upper limit of .159 (Round to three decimal places as needed.) b. What is the margin of error for this sample? The margin of error is (Round to three decimal places as needed.)