A country's tax coliocton agoncy reported that 91% of individual tax rotums wore filed electionicaly in 2017 A random sample of 215 tax returns trom 2018 was solociod From ths somple, 175 were filod eloctronically Completo parts a through c a. Construct a 99% confidenco interval to estmato the actual proportion of taxpsyers who filed electronically in 2013 Tho confidence interval has a lower imit of (Round to threo decimal places as needed) b. What is the maggin of orror tor this sample? The margin ot eroo is (Round to three decimal places as needed).