Consider a model of a wing-body shape mounted in a wind tunnel. the flow conditions in the test section are standard sea-level properties with a velocity of 100 m/s. the wing area and chord are 1.5 m2 and 0.45 m, respectively. using the wind tunnel force and moment-measuring balance, the moment about the center of gravity when the lift is zero is found to be -12.4 n-m. when the model is pitched to another angle of attack, the lift and moment about the center of gravity are measured to be 3675 n and 20.67 n-m, respectively. calculate the value of the moment coefficient about the aerodynamic center and the location of the aerodynamic center.