Use the Given Degree of Confidence and Sample Data to Find

Use the given degree of confidence and sample data to find a confidence interval for the population standard deviation ?.
Assume that the population has a normal distribution. Round the confidence interval limits to one more decimal place than is used for the original set of data.
-The football coach randomly selected ten players and timed how long each player took to perform a certain drill. The times (in minutes) were:
$$\begin{array} { c c c c c } 7 & 9 & 13 & 6 & 7 \\5 & 9 & 5 & 15 & 13\end{array}$$
Find a $95 \%$ confidence interval for the population standard deviation $\sigma$ .

A) $0.8 \mathrm {~min} < \sigma < 2.4 \mathrm {~min}$
B) $2.4 \mathrm {~min} < \sigma < 6.0 \mathrm {~min}$
C) $2.5 \mathrm {~min} < \sigma < 6.0 \mathrm {~min}$
D) $2.5 \mathrm {~min} < \sigma < 6.6 \mathrm {~min}$