According to a travel​ website, workers in a certain country lead the world in vacation​ days, averaging 22.78 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. 10 10 3 4 14 17 18 29 16 31 18 25 26 15 33 25 35 31 45 56 a. Construct a 95​% confidence interval to estimate the average number of paid vacation days for workers from this country. The 95​% confidence interval to estimate the average number of paid vacation days for workers from this country is from nothing days to nothing days. ​(Round to two decimal places as​ needed.)