~-50 points! -~- polygons qrst and q′r′s′t′ are shown on the following coordinate grid: what set of transformations is performed on qrst to form q′r′s′t′? a) a 180-degree clockwise rotation about the origin followed by a translation 1 unit to the right b) a 180-degree clockwise rotation about the origin followed by a translation 1 unit to the left c) a translation 1 unit to the left followed by a 270-degree counterclockwise rotation about the origin d) a translation 1 unit to the right followed by a 270-degree counterclockwise rotation about the origin