Sofa

FIG. 1 is a front, right and top perspective view of a sofa showing my design;

FIG. 2 is a rear, left and bottom perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left-side elevation view thereof;

FIG. 6 is a right-side elevation view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The dash-dash broken lines in the figures and the areas within the dash-dash broken lines show portions of the sofa that form no part of the claimed design.