9. Task B: B1: B2: B3: 15 marks) B4: As small AOA, how do you see C₂ varies with a ? As AOA increases, does the relationship you observes in B1

continues? Why? Is there any difference in the C₁ vs a relation you observed in B1, for airfoil with difference thickness, and different camber? At even higher AOA, what happen to the relationship between C₂ and a? In your own words, describes the flow phenomenon that has occurs. B5: Tabulate and discuss the Stall AOA and maximum C₂ of the 4 airfoil studied. B6: Compute and discuss the lift-curve slopes for the 4 airfoil studied. (15 marks)