May you please help me with this practice question?Thank you

A professor wants to estimate how long students stay connected during twohour online lectures. From a random sample of 26 students, the mean stay time was 80 minutes with a standard deviation of 14 minutes. Assuming the population has a normal distribution, devel0p a 95% confidence interval estimate for the population mean by determining the following values: a) Point Estimate :1 i b) df=| i Significance level (a) = [3 Determine the critical value rounded to 3 decimal places. Enter a positive value. [3 decimal places] CriticalvaluezS d) [3 decimal places] Standard Error:[:] e) [1 decimal place] Margin of Error:@ f) [1 decimal place] Lower Confidence Limit:@ 9) [1 decimal place] Upper Confidence Limit:[:] 2. Should we reject a claim that the population mean, ,u = 79 minutes? Why? Select an answer 3. If the sample size increases, what will be the effect on the margin of error? Select an answer a