FIG. 1 is a front view of an ornamental design for a sink of a third embodiment showing our new design;
FIG. 2 is a rear view of an ornamental design for the sink of the third embodiment;
FIG. 3 is a left side view of an ornamental design for the sink of the third embodiment;
FIG. 4 is a right side view of an ornamental design for the sink of the third embodiment;
FIG. 5 is a plan view of an ornamental design for the sink of the third embodiment;
FIG. 6 is a bottom view of an ornamental design for the sink of the third embodiment;
FIG. 7 is the first perspective view of an ornamental design for the sink of the third embodiment;
FIG. 8 is the second perspective view of an ornamental design for the sink of the third embodiment;
FIG. 9 is the third perspective view of an ornamental design for the sink of the third embodiment;
FIG. 10 is the fourth perspective view of an ornamental design for the sink of the third embodiment;
FIG. 11 is a cross-sectional view take on line A-A of FIG. 28;
FIG. 12 is a front view of an ornamental design for a sink of a fourth embodiment showing our new design;
FIG. 13 is a rear view of an ornamental design for the sink of the fourth embodiment;
FIG. 14 is a left side view of an ornamental design for the sink of the fourth embodiment;
FIG. 15 is a right side view of an ornamental design for the sink of the fourth embodiment;
FIG. 16 is a plan view of an ornamental design for the sink of the fourth embodiment;
FIG. 17 is a bottom view of an ornamental design for the sink of the fourth embodiment;
FIG. 18 is the first perspective view of an ornamental design for the sink of the fourth embodiment;
FIG. 19 is the second perspective view of an ornamental design for the sink of the fourth embodiment;
FIG. 20 is the third perspective view of an ornamental design for the sink of the fourth embodiment;
FIG. 21 is the fourth perspective view of an ornamental design for the sink of the fourth embodiment; and,
FIG. 22 is a cross-sectional view take on line A-A of FIG. 39.
