Polygons abcd and a'b'c'd' are shown on the following coordinate grid: what set of transformations is performed on abcd to form a'b'c'd'? a 90-degree counterclockwise rotation about the origin followed by a translation 1 unit to the left a translation 1 unit to the left followed by a 90-degree counterclockwise rotation about the origin a 270-degree counterclockwise rotation about the origin followed by a translation 1 unit to the left a translation 1 unit to the left followed by a 270-degree counterclockwise rotation about the origin