Hi, can someone help me with these questions?

StatChapter08 Part 1: Problem 7 Previous Problem Problem List Next Problem Results for this submission Entered Answer Preview Result Message 8.14 8.14 incorrect You are close. Check your rounding, and make sure you are using the correct distribution. 188.86 188.86 incorrect 205.14 205.14 incorrect At least one of the answers above is NOT correct. (1 point) In a sample of 11 textbooks from lower-level mathematics courses, the cost of a hardcover printed version has a mean of $197.00 and a (sample) standard deviation of $11.95. Use this sample data to find a 96% confidence interval for the mean cost of hardcover printed textbooks from all lower-level mathematics courses. Round all answers to the nearest cent (two decimal places). a. The margin of error for this confidence interval is: $ 8.14 b. The confidence interval is $ 188.86