Why does the air move faster on the top of the aerofoil than the air below. I want a good question and a short one and thus the high number of points, if you answer with not answer, your answer will be deleted

Arocket starts from rest and moves upward from the surface of the earth. for the first 10.0 s of its motion, the vertical acceleration of the rocket is given by ay = 12.80 m/s32t, where the +y-direction is upward. (a) what is the height of the rocket above the surface of the earth at t = 10.0 s? b) what is the speed of the rocket when it is 325 m above the surface of the earth?