The following bodies are made to roll up (without slipping) the same inclined plane from a horizontal plane : (i) a ring of radius R, (ii) a solid cylinder of radius $\frac{R}{2}$ and (iii) a solid sphere of radius $\frac{R}{4}$ . If, in each case, the speed of the center of mass at the bottom of the incline is same, the ratio of the maximum heights they climb is :