Sofa

FIG. 1 is a perspective view of a sofa showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof, a right side view being a mirror image of the left side view;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a perspective view thereof in a flattened configuration; and,

FIG. 8 is a perspective view thereof in a folded configuration.

The broken lines shown in the drawings depict portions of the sofa that form no part of the claimed design.