The ornamental design for a chair, as shown and described.
FIG. 1 is a left side perspective view of the present invention with the foot portion retracted; and
FIG. 2 is a left side perspective view of present invention in a planar position with the foot portion deployed in a planar manner; and
FIG. 3 is left side perspective view of the present invention with the foot portion deployed in an angular position; and
FIG. 4 is a right side view of the present invention with the foot portion deployed in an angular position; and
FIG. 5 is a left side view of the present invention with the foot portion deployed in an angular position; and
FIG. 6 is a front view of the present invention with the foot portion deployed in an angular manner position, and the armrests also in a fold position; and
FIG. 7 is a top view of the present invention with the foot portion positioned deployed in an angular position; and,
FIG. 8 is a bottom view of the present invention with the foot portion deployed in an angular position.
The broken lines showing of parts of the drawings is included for the purpose of illustrating use and environment and forms no part of the claimed design.