PLEASE HELP ON A TIME LIMIT!!! THANK YOU SO MUCH 2.A sample of n=48n=48 data values randomly selected from a normally di

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PLEASE HELP ON A TIME LIMIT!!! THANK YOU SO MUCH
2.A sample of n=48n=48 data values randomly selectedfrom a normally distributed population hasvariance s2=12s2=12. Construct a 99% confidence interval forthe population variance. Round your endpoints to one decimalplace.
4.A sample of n=24n=24 data values randomly selectedfrom a normally distributed population has standarddeviation s=5.7s=5.7. Construct a 90% confidence interval forthe population standard deviation. Round your endpoints to onedecimal place.
5.A sample of n=31n=31 data values randomly collectedfrom a normally distributed population has standarddeviation s=1.3s=1.3. We wish to test the nullhypothesis H0:σ=1H0:σ=1 against the alternativehypothesis H1:σ>1H1:σ>1 at a significanceof α=0.05α=0.05.
What is the value of the test statistic? Write your answerrounded to 3 decimal places.
What is the critical value? Write your answer rounded to 3decimal places.
Do we reject the null hypothesis?