The tоtаl number оf dаily hоme-bаsed-work (HBW) trips attracted by a zone is given by the following aggregate model:Zonal Daily HBW Trip Attractions = 1.5*(Office area) + 1*(Commercial area) + 0.7*(Institutional area) The downtown zone of a city has an Office area of 1000 units, Commercial area of 500 units, and Institutional area of 100 units. (same units as those used in the model) All trips are made in single-occupant cars (everyone drives alone), and everyone has the conventional 8 AM -5 PM work schedule. Workers are typically not combining other activities with their commutes. Calculate how many parking spots are needed in the downtown zone to serve the work trips demand. Indicate your numerical answer and give a short explanation on how you arrived at your solution.