Sink

FIG. 1 is a top, front, left perspective view of an embodiment of the claimed design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a top, front, left perspective view of another embodiment of the claimed design;

FIG. 8 is a front elevation view thereof;

FIG. 9 is a left side elevation view thereof;

FIG. 10 is a right side elevation view thereof;

FIG. 11 is a top plan view thereof; and,

FIG. 12 is a bottom plan view thereof.

The broken lines in the drawings show portions of the sink, which form no part of the claimed design. The dot-and-dashed lines represent a boundary between the claimed portion and the unclaimed portion of the sink.