The ornamental design for a sink, as shown and described.
FIG. 1 is a right, top, front perspective view of a sink embodying my new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a front elevational view thereof, the rear elevational view thereof being a mirror image of the front shown;
FIG. 4 is a right side elevational view thereof, the left side elevational view thereof being a mirror image of the right side shown;
FIG. 5 is a bottom plan view thereof; and,
FIG. 6 is a sectional view taken along line 6—6 of FIG. 2.
The broken line representations in the figures are for the purpose of illustration only, and form no part of the claimed design.
In a preferred embodiment, the nature of this product is as a plumbing fixture in the form of a sink which is primarily useful for washing various items.