How to get ad_unit_id for Rewarded Ads from Admob?

Warning!
Do not click on your own ads and advertisements in your own application! Do not look Rewarded Ads in your own application!

You should use the following identifiers for testing (if you want to click on ads in your application) so that you are not banned:

For test Admob banner in you app you need use "banner_ad_unit_id":
ca-app-pub-3940256099942544/6300978111

For test Rewarded Ads in you app you need use "rewarded_ad_unit_id":
ca-app-pub-3940256099942544/5224354917

App Id for testing "admob_app_id":
ca-app-pub-3940256099942544~3347511713

After testing, and before publishing the application, enter your real IDs.

In this tutorial I want to show how to get ad_unit_id for the ability to use Rewarded Ads. To get the Ad unit ID for Rewarded Ads you need only a few simple steps:
1.) Log in or sign up https://www.google.com/admob
This guide assumes that your application is already registered with admob, if not: How to get banner_ad_unit_id from AdMob (Android App)
2.) Click -> "Apps" and Select "YOU APP"
How to get rewarded_ad_unit_id from AdMob
3.) Click -> "Ad units" and Press "ADD AD UNIT"
How to get rewarded_ad_unit_id from AdMob
4.) Choose Rewarded and Press "SELECT"
How to get rewarded_ad_unit_id from AdMob
5.) Enter "Ad unit name", "Enter reward amount" and "Enter reward item". Press "CREATE AD UNIT"
How to get rewarded_ad_unit_id from AdMob
7.) Copy you "ad unit ID" (1) to constant value "rewarded_ad_unit_id" in file "res/values/strings.xml", and press "DONE"
How to get rewarded_ad_unit_id from AdMob