The ornamental design for a hat, as shown and described.
FIG. 1 is a perspective view of a hat showing my new design;
FIG. 2 is another perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a right side elevational view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a bottom plan view thereof; and,
FIG. 9 is a perspective view of the hat where the hat is in a configuration of use.
The broken lines along the hat surface in FIG. 8 depict portions of the hat that form no part of the claimed design. The broken line outline of the string lights and hats in the view of FIG. 9 depict environmental structure that assist in illustrating the claimed design in a position of use and from no part of the claimed design.