Help with android development

I've just started today to make my first android game...or at least I tried.
I have a problem in the unity, so here is what I've done.
I've click File then Build Setting and then chose Android and click switch platform, then I go to Edit Preferences and I know here I've got to configure JDK and SDK.

Well for JDK I downloaded Java SE Development Kit 13 and then I configured the path here for that folder but it says:
JDK installed with Unity is based on OpenJDK 1.8.0_152.
License information is in the install folder (AndroidPlayer/Tools/OpenJDK).
and a exclamation mark but in a white bubble, I think that's acceptable.

But for SDK I get the exclamation mark in a yellow triangle and it says
You are missing the recommended Android NDK. Install the recommended version with Unity Hub.
Alright so this is what I've tried, I accessed Android Studio page and downloaded the sdk tools that you find near the end of the page then I linked sdk folder to the sdk path like this E:/sdk-tools-windows-4333796.

Does this mean this is not the right version for my unity? How do I install it in Unity hub, I already got there click Installs then Add Modules and Added Android Build Support and Ios Buid iOS Build Support. I even installed Android Studio and got to Settings then installed a few android versions and sdk tools then I linked the path in unity to this folder tools but still the same result, I don't understand what I'm doing wrong...

 

Could you solve it? I have the same problem!