I keep getting the wrong answer can someone help?

A population of values has a normal distribution with ,u. = 125.4 and cr = 50.8. You intend to draw a random sample of size n : 53. a. Find the probability that a single randomly selected value is greater than 139.4. P(X> 139.4) = C] Round to 4 decimal places. b. Find the probability that the sample mean is greater than 139.4. POT > 139.4) = C] Round to 4 decimal places. Answers obtained using exact z-scores or zscores rounded to 2 decimal places are accepted