FIG. 1 is a perspective view of a first embodiment of the ornamental design for a chair according to the invention;
FIG. 2 is a left side elevational view of the chair of FIG. 1, the right side view being a mirror image thereof;
FIG. 3 is a front elevational view of the chair of FIG. 1;
FIG. 4 is a rear elevational view of the chair of FIG. 1;
FIG. 5 is a top plan view of the chair of FIG. 1;
FIG. 6 is a bottom plan view of the chair of FIG. 1;
FIG. 7 is a perspective view of a second embodiment of the ornamental design for a chair according to the invention;
FIG. 8 is a left side elevational view of the chair of FIG. 7, the right side view being a mirror image thereof;
FIG. 9 is a front elevational view of the chair of FIG. 7;
FIG. 10 is a rear elevational view of the chair of FIG. 7;
FIG. 11 is a top plan view of the chair of FIG. 7; and,
FIG. 12 is a bottom plan view of the chair of FIG. 7.
Portions of drawings shown in phantom outline are for illustrative purposes only and form no part of the claimed invention.