Networking Basics

I am not able to understand ques 8 and ques 9 of the Networking basics section labs of devops Pre requisite course . Please Help.

In question 7 you give each host a new IP but they will be with a different range which means they are in different networks so you will not able to ssh one from another.

in the q9 you are asked to rechange the IPs so that the hosts will be in the same network and will resolve the ssh issue.