FIG. 1 is a perspective view of a marker;

FIG. 2 is a side elevational view of the marker shown in FIG. 1, the opposite side being a mirror image thereof.

FIG. 3 is a rear elevational view of the marker shown in FIG. 1.

FIG. 4 is a front elevational view of the marker shown in FIG. 1.

FIG. 5 is a top plan view of the marker shown in FIG. 1; and,

FIG. 6 is a bottom plan view of the marker shown in FIG. 1.

The dashed lines in the drawings are for environmental purposes only and form no part of the claimed design.