A.)If the 95% confidence interval for the population mean is (6,20), what is the sample mean?

B.)Given the 95% CI in part a, would (5,21) be a possible 99% CI for the same sample of data? If not, why not?

C.)Given the 95% CI in part a, would(8,19) be a possible 99% CI for the same sample of data? If not, why not?

D.)Given the 95% CI in part a, would (4,28) be a possible 99% CI for the same sample of data? If not, why not?