Chair seat and back

FIG. 1 is an isometric view of the chair seat and back showing the new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The lines drawn on the seat and chair back are shade lines and not decoration; the broken lines are not part of the claimed design but are for environmental purposes only; the claimed design is for a product configuration only; surface decoration does not form part of the claimed design.