The homeownership rates in a certain country have been declining The country's homeowner uppose, from a random sample of 256 households in the country in 2018. 103 were occupied by the owners of the residence. Complete parts a through c. a. Construct a 99%% confidence interval to estimate the actual proportion of households in the country their owners in 20 18 The confidence interval has a lower limit of 323 and an upper limit of 481 (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