FIG. 1 is an upper front left perspective view of a sink top of my design, the dashed lines representing unclaimed features;
FIG. 2 is an enlarged front plan view thereof, the rear plan view being a mirror image thereof;
FIG. 3 is an enlarged left side plan view thereof;
FIG. 4 is an enlarged right side plan view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is an upper front left perspective view of a second embodiment of a sink top of my design;
FIG. 8 is an enlarged front plan view thereof, the rear plan view being a mirror image thereof;
FIG. 9 is an enlarged left side plan view thereof;
FIG. 10 is an enlarged right side plan view thereof;
FIG. 11 is a top plan view thereof; and,
FIG. 12 is a bottom plan view thereof.
The broken lines shown in the drawings are included for the purpose of illustrating a portion of the sink that forms no part of the claimed design.