The ornamental design for a seat, as shown and described.
FIG. 1 is a front perspective view of a seat showing my design in the form
of a sofa;
FIG. 2 is a front perspective view of the design shown in the form of a
loveseat;
FIG. 3 is a front perspective view of the design shown in the form of a
lounge chair; and
FIG. 4 is a side perspective view of the design shown in the form of a
recliner.
The undisclosed sides of the seat forms are mirror images of the respective
sides shown while the rear surfaces thereof are conventional in appearance
.