According to the center for disease control and prevention, 20.6% of the U.S. population smoked in 2008. In 2010

According to the center for disease control and prevention, 20.6% of the U.S. population smoked in 2008. In 2010, a random sample of 650 American was selected, 124 of whom smoked.
Construct a 90% confidence interval to estimate the actual proportion of people who smoked in the United States in 2010.