The ornamental design for a chair, as shown and described.
Applicants incorporate by reference in its entirety the co-pending application Ser. No. 29/340,419, which was filed on the same date as the present application.
FIG. 1 is a perspective view of a first embodiment of a chair.
FIG. 2 is a front view of a chair.
FIG. 3 is a back viewof a chair.
FIG. 4 is a left side view of a chair.
FIG. 5 is a right side view of a chair.
FIG. 6 is a top view of a chair.
FIG. 7 is a bottom view of a chair; and,
FIG. 8 is a prespective view of a second embodiment showing three adjacent chairs.