Twenty years ago, a very famous psychologist specializing in marriage counseling authored a book detailing the way in which she believed spouses should communicate. She is now interested in the proportion of all couples who bought her book who stayed together. For a random sample of couples who bought her book, she found that of them stayed together. Based on this, compute a confidence interval for the proportion of all couples who bought her book who stayed together. Then find the lower limit and upper limit of the confidence interval.