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Please find the confidence interval for the population variance is ( , ) and ) the confidence interval for the population standard deviation is (

Please find the confidence interval for the population variance is ( , ) and ) the confidence interval for the population standard deviation is ( , )
The waiting times (in minutes) of a random sample of 21 people at a bank have a sample standard deviation of 3.3 minutes. Construct a confidence interval for the population variance of and the population standard deviation o. Use a 99% level of confidence. Assume the sample is from a normally distributed population. What is the confidence interval for the population variance o?? ([.[)(Round to one decimal place as needed.)

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