Sofa

FIG. 1 is a perspective view of a sofa showing my new design; FIG. 2 is another perspective view thereof; FIG. 3 is a front perspective view thereof; FIG. 4 is a back perspective view thereof; FIG. 5 is a left side perspective view thereof; FIG. 6 is a right side perspective view thereof; FIG. 7 is a top plan view thereof; and, FIG. 8 is a bottom plan view thereof.