The piper cherokee (a light, single-engine general aviation aircraft) has a wing area of 170 ft2 and a wing span of 32 ft. itsmaximum gross weight is 2450 lb. the wing uses an naca 65-415 airfoil, which has a lift slope of 0.1033 degree-1 andal=0 = -3°. assume t = 0.12. if the airplane is cruising at 120 mi/h at standard sea level at its maximum gross weight and isin straight-and-level flight, calculate the geometric angle of attack of the wing.