= -0.25 A scientist modifies the Blasius expression for shear stress under turbulent regime as, (R/pu) = 0.0313(Usp8/u)-0. Derive the following relationships using Prandtl one-seventh power law and determine the relative error of each as compared to the original Blasius expression. a) Boundary layer thickness and x b) Boundary layer thickening rate c) Displacement thickness and 8 d) Laminar sublayer thickness and x If air (p= 1.3 kg/m?,u= 17x10-6 N.s/m) is flowing at a velocity, uz of 5 m/s over a plane surface, determine the critical distance, Xc and the extent of x where Blasius expression is applicable