Static Routing with Backup Route
Configure G0/0 on R1 and R2 to be the first IP of the labelled subnets
Configure G0/1 on R1 to be 1st IP of 10.0.0.0/30 subnet and G0/1 on R2 to be the last.
Configure G0/2 on R1 to be 1st IP of 10.0.0.4/30 subnet and G0/1 on R2 to be the last.
Create primary static route on R1 and R2 to allow PC0 and PC1 to ping each other via the 10.0.0.0/30 network, static routes to be done via IP addresses and not interfaces
Create a backup route via the 10.0.0.4/30 network should the G0/1 fail.
Test backup route by removing or shutting down the link between R1 and R2 G0/1 interfaces.