Sink

FIG. 1 is a perspective view of the sink of the present invention. FIG. 2 is a front elevation of the sink of the present invention. FIG. 3 is a rear elevation of the sink of the present invention. FIG. 4 is a right side elevation of the sink of the present invention. FIG. 5 is a left side elevation of the sink of the present invention. FIG. 6 is a top view of the sink of the present invention; and, FIG. 7 is a bottom view of the sink of the present invention. The broken lines illustrate portions of the sink that form no part of the claimed design.