) A fluid of density and viscosity is falling under gravity from two vertical parallel plates separated by a horizontal distance h. The left plate is moving upward with velocity u1, but right plate is moving downward (i.e., in the direction of flow) with a velocity u2. (u2>u1) (i) Obtain the governing equation of fluid flow starting with the Navier-Stokes equation (do NOT ignore the pressure drop and keep it as constant for the whole problem. Be careful of sign of velocity components) (ii) Write the boundary conditions. (iii) Obtain the expression of velocity vy(x) by the solving the Navier -Stokes equatio