2) Please discuss the boundary layer theory for fluid flow and also show the formation of boundary layer for laminar flow at the entrance region of a tube. From your opinion, what could be helpful to your future studies, design or research regarding the laminar flow? (16 points) 2. Calculations (50 points) (1) As shown in Figure below, the U tube mercury manometer is used to measure the pressure ps within a sealed tank. Now we know the positions zi=2.4m, z2 =0.3m, z3 =1.8m, 24 =0.5m, 25 =3.0m. Please give the hydrostatic equilibrium equation and calculate ps. (15 points) 5 P. 5 3 | 3 4 2 2