I claim the ornamental design for a hat, as shown and described.
FIG. 1 is a top perspective view of a hat,
FIG. 2 is a left side view of the hat of FIG. 1,
FIG. 3 is a right side view of the hat of FIG. 1,
FIG. 4 is a front view of the hat of FIG. 1,
FIG. 5 is a rear view of the hat of FIG. 1,
FIG. 6 is a top view of the hat of FIG. 1; and,
FIG. 7 is a bottom view of the hat of FIG. 1.
The broken lines showing the head and neck of a model in FIGS. 1-5 illustrate the environment in which the hat is used, and form no part of the claim. All other broken lines illustrate portions of the hat to which the design is applied that form no part of the claim.