please guys be careful, this is the second time I sent this question and I still getting the upper and lower limits wrong. and please send the answer a little bit faster ?

Sherds of clay vessels were put together to reconstruct rim diameters of the original ceramic vessels at the Wind Mountain archaeological site. A random sample of ceramic vessels ga the following rim diameters (in centimeters). 15.9 13.4 22.1 12.7 13.1 19.6 11.7 13.5 17.7 18.1 (a) Use a calculator with mean and sample standard deviation keys to find the sample mean x and sample standard deviation s. (Round your answers to one decimal place.) X = 15.8 cm S = 3. cm (b) Compute a 95% confidence interval for the population mean u of rim diameters for such ceramic vessels found at the Wind Mountain archaeological site. (Round your answ to one decimal place.) lower limit 13.63 X cm upper limit 17.97 X cm