We claim the ornamental design for a sink, as shown and described.
FIG. 1 is a perspective view of an embodiment of the claimed design;
FIG. 2 is a front view of the design shown in FIG. 1;
FIG. 3 is a top view of the design shown in FIG. 1;
FIG. 4 is a side view of the design shown in FIG. 1;
FIG. 5 is a cross-sectional view of the design shown in FIG. 1 taken along line 5-5 in FIG. 3;
FIG. 6 is a cross-sectional view of the design shown in FIG. 1 taken along line 6-6 in FIG. 3;
FIG. 7 is a perspective view of another embodiment of the claimed design;
FIG. 8 is a front view of the design shown in FIG. 7;
FIG. 9 is a top view of the design shown in FIG. 7;
FIG. 10 is a side view of the design shown in FIG. 7;
FIG. 11 is a cross-sectional view of the design shown in FIG. 7 taken along line 11-11 in FIG. 9; and,
FIG. 12 is a cross-sectional view of the design shown in FIG. 7 taken along line 12-12 in FIG. 9.
The ornamental design which is claimed is shown in solid lines in the drawings. The broken lines in the drawings are for illustrative purposes only and form no part of the claimed design. Broken lines formed by equal length dashes (i.e., dash-dash) show unclaimed portions of the design. Broken lines formed of unequal length dashes (i.e., dash-dot) show unclaimed boundaries between claimed and unclaimed portions of the design.