The ornamental design for a seat, as shown and described.
FIG. 1 is a left perspective view of a seat showing our new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a left side view thereof, the right side being a mirror image;
FIG. 5 is a left perspective view of a second embodiment of a seat;
FIG. 6 is a top plan view thereof;
FIG. 7 is a front view thereof; and,
FIG. 8 is a left side view thereof, the right side being a mirror image.
In the drawings, the broken line showing of a seat depicts environmental subject matter and forms no part of the claim. The break lines shown in FIGS. 5–7 indicate indeterminate length.