I need help with question number 10.

10. Assuming that the number of fish Greg caught are normally distributed (bell shaped), what is the probability he will catch 15 or more fish the next time he goes fishing? Greg and Frank went on a 10-day fishing trip. The number of smallmouth bass caught and released by the two boys each day was as follows: Greg 9 24 8 9 5 8 9 10 8 Frank 10 15 2 3 18 20 1 17 2 19 3