[Nostradevus]

a) First I want to say yes you could do this given the thickness of the wing, it would just add an extra term into our calculations as you will see in a moment [Would you get on an airplane that had been built by engineers that had neglected the thickness of the wing?]. To do this problem we need to make use of Bernoulli's equation. p1+d*g*y1+.5*d*v1^2=p2+d*g*y2+.5*d*v2^2. Since we can neglect the thickness of the wing the two middle terms cancel out leaving us with p2-p1= .5*d*v1^2 - .5*d*v2^2. d is the density of air. Now just plug in your given values for v1, v2, and d and the problem is solved.b) Now all you have to do is use p=F/A or p2-p1=(F2-F1)/A. So, F2-F1=A(p2-p1) using your value for A and the result of part a)