"Are there any similar tasks that are solved?"
Similar to what?
As for Router A, it depends on what you want to route to. Further, assuming you want to route to the two remote host networks, their masks are unknown unless you assume they are using classful addressing.
Assuming we do want to route to the two host containing networks, and also assuming they are class C networks, the two entries in the route table for them would be:
192.168.2.0 255.255.255.0 192.168.4.1 e2
192.168.3.0 255.255.255.0 192.168.0.2 e1
