Sofa

FIG. 1 is a front, top, left perspective view of a sofa, showing my new design; FIG. 2 is a rear, top, right perspective view thereof; FIG. 3 is a rear, bottom, left perspective view thereof; FIG. 4 is a rear, top, left perspective view thereof; FIG. 5 is a front, top, right perspective view thereof; FIG. 6 is a front elevational view thereof; FIG. 7 is a rear elevational view thereof; FIG. 8 is a top plan view thereof; FIG. 9 is a bottom plan view thereof; FIG. 10 is a right side elevational view thereof, the left side elevational view being a mirror image; and, FIG. 11 is an enlarged, cross-sectional view taken along line 11 - 11 in FIG. 6 .