Rear bumper for automobile

FIG. 1 is a front elevational view of a rear bumper for an automobile showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side perspective view thereof;

FIG. 6 is a top, front and right side perspective view thereof; and,

FIG. 7 is a bottom, front and left side perspective view thereof.

The rear view of the rear bumper forms no part of the claimed design since it will not be visible once the rear bumper is mounted to an automobile.