An airplane flies horizontally with a constant speed of 155.0 m/s at an unknown altitude. A package is released out of the airplane and takes 14.43 s to hit the ground. Ignore air resistance. The magnitude of the gravitational acceleration is 9.8 m/s2. Choose the RIGHT as positive x-direction. Choose UPWARD as positive y-direction Be careful, partial credit can't be given within each calculation. (a) What is the initial altitude (in meters) of the airplane (and the package) when the package is released