Your branch office is expanding, and you have added a new subnet. The new subnet currently has a single switch, Branch4. The switch connects through its FastEthernet0/24 interface to the FastEthernet0/1 interface on the router. The new subnet uses 192.168.12.0 as the subnet address for its default subnet mask. Complete the configuration of both new devices as follows: 

On the SFO router: Configure the FastEthernet0/1 interface with the last available IP address on the subnet. 

Bring the interface up. 

Add the description Link to Branch4 to the FastEthernet0/1 interface. 

On the Branch4 switch: 

Assign the switch the fourth available IP address on the subnet

. Configure the Branch4 switch with a default gateway.

 Default gateway IP: 192.168.12.254 

Add a description Link to SFO to the FastEthernet0/24 interface.