Rear Bumper for Automobile

FIG. 1 is a first side perspective view of a rear bumper for an automobile in accordance with our new design; FIG. 2 is a second side perspective view thereof; FIG. 3 is a front elevational view thereof; FIG. 4 is a top plan view thereof; FIG. 5 is a bottom plan view thereof; FIG. 6 is a right side elevational view thereof; and, FIG. 7 is a left side elevational view thereof. The rear view of the rear bumper forms no part of the claimed design. The inside surfaces and mounting surfaces of the rear bumper, shown in broken lines in FIGS. 1 to 7 form no part of the claimed design since these surfaces are hidden when the rear bumper is mounted to the automobile.