A speedboat on hydrofoils (like an airfoil) is moving at 10 m/s in a freshwater lake. Each hydrofoil is 2 m below the water surface. Assuming, as an approximation, frictionless, incompressible flow, a). find the stagnation pressure (gage) at the front of each hydrofoil. b). At one point on hydrofoil, the pressure is -30 kPa (gage). Calculate the speed of the water relative to the hydrofoil at this point and the absolute water speed. (Note: Gage pressure is calculated based on the atmospheric pressure, which serves as the reference pressure)