Which is true regarding EIGRP successor routes?1. A successor route is used by EIGRP to forward traffic to a destination.2. Successor routes are saved in the topology table to be used if the primary route fails.3. Successor routes are flagged as "active" in the routing table.4. A successor route may be backed up by a feasible successor route.5. Successor routes are stored in the neighbor table following the discovery process.