Consider a mobile device that powers on and attaches to an LTE visited network A and assume that indirect routing to the mobile device from its home network H is being used. Subsequently, while roaming, the device moves out of range of visited network A and moves into range of an LTE visited network B. You will design a handover process from a base station BS.A in visited network A to a base station BS.B in visited network B. Sketch the series of steps that would need to be taken, taking care to identify the network elements involved (and the networks to which they belong), to accomplish this handover. Assume that following handover, the tunnel from the home network to the visited network will terminate in visiting network B.