A usecase of rebase with solution

How the challenge was solved?

Question: Let's say I have a stable project on `master` branch having commit message "A-message", my 2 team members are working on 2 individual features - `useragent` (commit message "B-message") & `base64` (commit message "C-message"). They both have raised 2 different pull requests and I have to take care of both of them, then following solution is helpful.

Challenge is how to set commit history in such manner that over `master` branch, I will have the following sequence.
```
C-message
B-message
A-message
```

Solution:
`git clone <challenge-url>`
`git checkout master`
`git rebase feature/useragent master`
(This will add feature/useragent's commit B-message on the top of A-message on master branch.)

-----
[For the safe side, I push to my-origin from cloned challenge url]
`git remote add my-origin <my-solution-url>`
git push my-origin master
(my-origin branch will have following sequence.
```
B-message
A-message
```)
-----

`git checkout feature/useragent`
`git rebase feature/base64 feature/useragent`
(Note: your branch has been switched to feature/base64 from feature/useragent.)

Then fix the conflicts [Don't forget to set correct code] & continue rebase
`git rebase --continue`
It will prompt you to enter commit message [I kept it as it is].

By now, you'll have the correct message sequence but within `base64` branch but we need it within `master` branch, so we have to do the following.
`git rebase feature/base64 master`

Check your log to see the sequence, it should look like as follow:
```
C-message
B-message
A-message
```

----DONE----