Which Rotation?

Find how the object has been rotated to each of the images. For each rotation, you should find a) the centre of rotation (It will be one of (-2, 1), (0, -3) or (5, 1) b) the amount of turn (it will be clockwise, you must find if it is 90, 180 or 270 degrees) Do this for the image that is 1. yellow 2. pale blue 3. green 4. red