Hello! Please help me solve for this problem. Thank you!

A bottling machine can be regulated so that it discharges an average of u ounces per bottle. It has been observed that the amount of fill dispensed by the machine is normally distributed with o = 1.0 ounce. If a sample of n = 9 filled bottles is randomly selected from the output of the machine on a given day (all bottled with the same machine setting), and the ounces of fill are measured for each, then the probability that the sample mean will be within 0.32 ounce of the true mean is 0.6629. Suppose that Y is to be computed using a sample of size n. (a) If n = 16, what is P(| Y - u|