Arm

FIG. 1 is a perspective view of an arm showing the new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is yet another perspective view thereof;

FIG. 4 is a left elevational view thereof;

FIG. 5 is a right elevational view thereof;

FIG. 6 is a rear elevation view thereof;

FIG. 7 is a front elevation view thereof;

FIG. 8 is a top plan view thereof; and,

FIG. 9 is an enlarged view of the encircled material of FIG. 2 .

The broken lines depict portions of the article that form no part of the claimed design.