Problem #2: The Burj Khalifa in Dubai is currently the world's tallest building. If air at 100F is at an atmospheric pressure of 14.7 psi at the ground floor (sea level), determine the absolute pressure at the top of the building, which has an elevation of 2717 ft. Assume that the temperature is constant and that air is compressible. Work the problem again assuming that air is incompressible. Round off the answers to four significant figures.