So, first we would have to order it from least to greatest which would be : 6,9,10,11,11,14,18,19,21,22,27,29. We would see that 11 is repeated twice . Number 11 is the modal.
If there was 31 dogwood trees already there and after there was a total of 96 dogwood trees therefore all you would have to do is subtract (96-31) you would get 65 so the answer is 65