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