Delineation of the various residential groups, indicating, for each such grouping, its general extent, size and composition in terms of total number of dwelling units and approximate percentage allocation by dwelling unit type (i.e., single-family detached, duplex, townhouses, garden apartments, high-rise, luxury, middle-income, moderate-income, elderly units, family units, etc.), plus a calculation of the residential density in dwelling units per gross acre (total area, including interior roadways) for each such area.