FIG. 1 is a front perspective view of a seat, showing our new design; FIG. 2 is a front elevation view thereof; FIG. 3 is a side elevation view thereof taken from the left of FIG. 2, the opposite side being a mirror image thereof; FIG. 4 is a rear elevation view thereof; FIG. 5 is a top plan view thereof; FIG. 6 is a bottom plan view thereof; and, FIG. 7 is another front view thereof.