Configure EIGRP 100 and EIGRP YY peer the IGP topology diagram.
EIGRP updates should be advertised only out to the interface peer the IGP topology diagram.
Use auto summery on in EIGRP YY
On R1, Mutual redistribution between OSPF and EIGRP YY. However all of the routes that are indicated below from Backbone 3 (EIGRP 100) should no be redistributed between both the protocols. Use rote-map to accomplish this requirement all rout-maps should use one access list.
On OSPF area 0, EIGRP 100 routers should be choose the connection through R3 and should be seen as one path.
On R3, Redistribute from EIGRP 100 into OSPF with metrictype-2
On R3 redistribute from Eigrp 200 to EIGRP YY. however three networks 198.2.1.0 198.2.3.0 and 198.2.5.0 should be aggrigated into a single adress with the most specific mask possible.