What set of transformations is performed on triangle rst to form triangle r’s’t’? a 90-degree counterclockwise rotation about the origin followed by a translation 2 units left a 270-degree counterclockwise rotation about the origin followed by a translation 2 units to the right a translation 2 units down followed by a 90-degree counterclockwise rotation about the origin a translation 2 units down followed by a 270-degree counterclockwise rotation about the origin