An object of constant height is positioned on the principal axis of a concave spherical mirror of focal length \(f\), at an initial distance \(d_o > 2f\) from the mirror. The object moves toward the mirror along the principal axis at a constant speed \(v_0\). Which of the following correctly describes the direction of motion of the real image, the speed \(v_i\) of the image at the instant the object reaches the center of curvature (\(d_o = 2f\)), and the change in image height as the object approaches \(2f\)?