According to a travel website, workers in a certain country lead the world in vacation days, averaging 21.98 days per year. The following data show the number of paid vacation days for a random sample of 20 workers from this country, Complete parts a through c below. N & a. Construct a 90% confidence interval to estimate the r of paid vacation days for workers from this country The 90% confidence interval to estimate the average nu 's for workers from this country is from Ill days to days (Round to two decimal places as needed.)