Polygons abcd and a′b′c′d′ are shown on the coordinate grid: what set of transformations is performed on abcd to form a′b′c′d′? a translation 1 unit to the left followed by a 180-degree counterclockwise rotation about the origin a translation 1 unit to the right followed by a 180-degree counterclockwise rotation about the origin a 90-degree counterclockwise rotation about the origin followed by a translation 1 unit to the right a 90-degree counterclockwise rotation about the origin followed by a translation 1 unit to the left