I claim the ornamental design for a hat, as shown and described.
FIG. 1 is a front, top and side perspective view of the hat embodying the design of the present invention, the wearer being shown in dotted lines as the wearer forms no part of the invention.
FIG. 2 is a top plan view thereof.
FIG. 3 is a front elevational view thereof.
FIG. 4 is a bottom plan view thereof.
FIG. 5 is a side elevational view thereof, the side opposite being identical to the side shown; and,