An airfoil is in a flow set to an altitude of hG = 3 km. At this point in the streamline, the velocity is Vā = 306 km/hr. At a certain point on the airfoil, the velocity has increased to V2 = 639 km/hr. What is the pressure (p2) in N/m2 at this velocity? Using this information and details from Example 3.1, calculate the percentage change in velocity and the percentage change in pressure as well.