For a uniform flow U across a flat plate of width W and length L, if
we assume that the velocity profile inside the
boundary layer is given by
vx/U = sin ((?*y)/(2?))

where ? is pi

use the von Karman integral analysis to determine:
(a) the boundary layer thickness ?(x)
(b) the local stress on the wall ?w(x)
(c) the overall force F on the wall
(d) the relationship between the drag coefficient CD =
2F/(?*(U^2)*L*W) and the Reynolds number Re = L?U/?.