How to get ad_unit_id for Rewarded Ads from Admob?

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:

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)

Click -> "Apps" and Select "YOU APP"

Click -> "Ad units" and Press "ADD AD UNIT"

Choose Rewarded and Press "SELECT"

Enter "Ad unit name", "Enter reward amount" and "Enter reward item". Press "CREATE AD UNIT"

Copy you "ad unit ID" (1) to constant value "rewarded_ad_unit_id" in file "res/values/strings.xml", and press "DONE"