Performing the task of hydrodynamics

The services of a specialist in hydrodynamics are required. We need to complete a mission.
Continuous flow of incompressible liquid of some section, having the characteristics :

- Mass.

- Speed.

-Denseness.

- Viscosity.
It falls at point A on an infinite plane unfolded perpendicular to the flow and constituting the angle Alpha with the surface of the earth.
The point (line ?)B is on the plane (farther from the source of the flow).

Need to:

Describe the process mathematically

- Show that a degenerate flow comes to point B (compared to point A)

Determine the lifting force acting on the plane at point A and the total

Show that the pressure on the plane is proportional to the wetting area of the surface

-Account for friction and flow reflection