A project involves the rezoning of mixed use/industrial land for commercial/housing purposes, the construction of a 40-story apartment building with stores on the ground floor, and the extension of an existing train line to service the area. Project alternatives include (1) "no build", (2) omitting the train extension aspect, and (3) using green methods during construction. Public scoping revealed that traffic and income are twice as important as air chemical, water use or energy use. Calculate the overall impact of the proposed project and each project alternative, identify the optimum project, and explain your choice. Show your work.