Two identical disks, with rotational inertia I 1/2 MR2), roll without slipping with the same initial speed across a horizontal floor and then up inclines. Disk A rolls up its incline without sliding. On the other hand, disk B rolls upa frictionless incline. Otherwise the inclines are identical. Disk A reaches a height 12 cm above the floor before rolling down again. Disk B reaches a height above the floor of