Refer to the exhibit.The actual speed of the serial links between R2 and R3 are 256 kb/s and 512k b/s respectively. When configuring EIGRP on routers R2 and R3, the network administrator configured the bandwidth of both serial interfaces to 512 kb/s. What will be the effect?（）

Refer to the exhibit. When you examine the routing table of R1 and R4, you are not able to see the R1 Ethernet subnet on the R4 routing ta ble. You are also not able to see the R4 Ethernet subnet on the R1 routing table.
Which configuration change should be made to resolve this issue? Select the routers where the configuration change will be required, and select the required EIGRP configur ation command(s).（）