(c) A smooth rectangular plate of negligible thickness having dimensions 1m12m is submerged in a fluid stream with its longer edges parallel to the flow. If the free stream velocity, U, outside the boundary layer is 25ms1 : i. Calculate the wall shear stress at the trailing edge; [15\%] ii. Locate the point above the plate at which the fluid velocity reaches 12ms1, explaining clearly the reasoning behind your calculation The local skin-friction coefficient, cf, may be estimated from the PrandtlSchlichting correlation: cf=(0.65+0.87lnRx)23, in terms of the Reynolds number R.. The thickness of the laminar sub-layer can be estimated from the relationship: =11.6v/o/ The physical properties of the fluid are v=15106m2s1, and =1.3kgm3