The ornamental design for a hat, as shown and described.
FIG. 1 is a perspective view of an embodiment of a hat of the subject disclosure, showing the hat on the head of a user;
FIG. 2 is a perspective view of the hat shown in FIG. 1, showing the hat separate from the head of the user;
FIG. 3 is a front elevation view of the hat shown in FIG. 2;
FIG. 4 is a rear elevation view of the hat shown in FIG. 2;
FIG. 5 is a left side elevation view of the hat shown in FIG. 2;
FIG. 6 is a right side elevation view of the hat shown in FIG. 2;
FIG. 7 is a top plan view of the hat shown in FIG. 2; and,
FIG. 8 is a bottom plan view of that hat shown in FIG. 2.
The uniform broken lines shown in FIGS. 1-3 and 5-8 illustrate environmental subject matter that forms no part of the claimed design. The long-dash, short-dash broken lines in FIG. 1 depict a wearer, included to show how the claimed design may appear when worn, and form no part of the claimed design.