(1. Set the IP addresses of the computer and router. Set the IP addresses of PCA and PCB as 10.65.1.1 and 10.71.1.1 respectively. [root#PCAroot]#ifconfigeth010.65.1.1netmask255.255.0.0[root#PCBroot]#ifconfigeth010.71.1.1netmask255.255.0.0[root#PCCroot]#ifconfigeth010.70.1.1netmask255.255.)