An F-15 is flying straight and level lift equals weight) at 8 km standard day conditions at a velocity of 260 m/s. Given the following data for the F-15, answer the questions that follow: Parasite/Profile drag coefficient CD0-0.018, wing span b-12.9 m, wing area s = 56.7 m2, mass m = 22.680 kg. Oswald efficiency factor eo0.915

(a) What is the wing's aspect ratio A?
(b) What is the lift force L generated by the aircraft?
(c) What is the aircraft's drag coefficient CD?
(d) What is the drag force D generated by the aircraft?