Rear Bumper for an Automobile

FIG. 1 is a first perspective view of a rear bumper for an automobile, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a right side elevational view thereof; and,

FIG. 5 is a left side elevational view thereof.

The claimed design is indicated by the relatively dark portion, while the relatively light portions form no part of the claimed design.