I need help on STAT please!!!!

7. A class survey in a large class for first-year college students asked, "About how many hours do you study in a typical week?". The mean response of the 466 students wasx (bar)= 16 hours. Suppose that we know that the study time follows a Normal distribution with standard deviation 8 hours in the population of all first-year students at this university.

What is the 99% confidence interval (0.001) for the population mean?

Confidence interval is from ____to ____hours.