Will mark !

the image of abc is a'b'c. what transformations would result in this image?

abc is reflected over the line x = 1, then is rotated -90° around the origin.
abc is reflected over the line y = x - 1, then t: (x, y) → (x - 1, y - 1).
abc is rotated 90° around the origin, then is reflected over the y-axis.
abc is rotated -90° around the origin, then is reflected over the line y = -1.