Q4. (12 points) The thin airfoil theory is used to describe the 2D potential flow around a parabolically curved plate of length c in a uniform free stream with velocity V and orientated a small angle a with respect to the x-axis z x Voo 2 = -0.06 (*)",050 sc The profile is given by z(x) a. Calculate the value of the coefficients A0, A1 and A2 (The related definitions same as in the text book). b. Determine for a = 0 the value of the lift coefficient and the position of the centre of pressure. c. Determine the value of a where the lift is zero