Answer ALL questions in English. 1. (a) Use the parabolic velocity profile: Uu=(2y2y2);0y with the equations for Von Karman integral and the momentum thickness, +to obtain expressions for the approximate boundary layer thickness () and local skin (b) Estimate the local air velocity y; and the local shear stress 0 at the position (x,y)=(50cm,5mm) using expressions in Part (a). For air, take =1.2kg/m3 and =1.8105kg/ms. (c) If the exact Blasius solution were to be used to solve the problem in Part (b), compute the improvement in the estimation of local shear stress, T0, using data from Table Q1