I have faced the same issue. In my case one of the interfaces was down. I have activated it and it solved the issue.
Initially, check your routing table
If you are enable mode, use
show ip interface brief
If you are in configuration mode, use
do show ip int bri ( here do is added )
Check the topology of your network and set the ip address ...
They're asking you to create 3 different subnets. You're overlapping because rather than carrying on from the 2nd subnet your first operation produced, you're just slicing the same initial net in smaller chunks, so of course they overlap, it's still the same network.
Your first operation produced 4 networks, 2nd one being 192.168.1.64,
Ideally, you'd want to ...
IOS does not show anything more than you're already seeing. You are expected to remember which line(s) you selected. Why would you be sitting in line configuration mode any longer than necessary to enter the desired line configuration commands? You can't end up in line config mode without specifying the line(s), so it really doesn't need to be in the prompt -...