Consider an airplane of wing area 6.8 m^2 (both wings combined) flying through air of density 1.13 kg/m^3. From the plane's point of view, the air flowing above the plane's wings has speed 212 m/s, but the air flowing below the wings has speed 188 m/s. Assume laminar air flow both above and below the plane's wings. The plane is flying horizontally. What is the net upward lift force on the plane? Answer in units of kN.