Over the past several months, an adult patient has been treated for tetany (severe muscle spasms). This condition is associated with an average total calcium level below 6mg/dl. Recently the patients...

Over the past several months, an adult patient has been treated for tetany (severe muscle spasms). This condition is associated with an average total calcium level below 6mg/dl. Recently the patients total calcicum test gave the following readings in (mg/dl). Assume that the population of x values an approximately normal distribution.

9.9   9.4   10.5   8.5   9.4   9.8   10.0   9.9   11.2   12.1

xbar= 10.07

s=      1.00              I got this first part But cannot figue next part out.

Find a 99% Confidence Interval for the population mean of total calcium in this patients blood. (Round to 2 Decimal Places.)