I have one question concerning the ghunnah and its ranks. In your tajweed lesson you said there are 4 ranks.

Question
As-salamou aleykom wa rahmatoullahi wa barakatuh

First jazakoumou Allahou khayran for your great work!!!!

I have one question concerning the ghunnah and its ranks. In your tajweed lesson you said there are 4 ranks.
 
I am asking if the last rank (ithaar) when making it clear whith a noun sakinah for example: min hakim >> is it the same rank when we stop on a noun sakinah for example: rabbi al 3alamin. when stopping at "3alamin".

In other words, are these two examples the same (in their ranks of ghunnah) ?

BaraakaAllahou fikoum wa salam aleykom!!

Answer
Wa alaikum assalaam wa rahmatullahi wa barakatuh,
The of the or  saakinah is the third rank, not the last rank of the ghunnah.  The last or fourth rank is for these two letters when they have a vowel on them and are pronounced with the vowel. 
As to your question, yes, masha' Allah very good dervation, when we put a sukoon on the for stopping, it will have the same rank, ie third rank as the saakinah read with .
Wa feekum al-Barakah.

For those wanting to read about the ranks of the ghunnah please see the following link:
http://www.abouttajweed.com/the-ghunnah-and-its-ranks/ranks-of-the-ghunnah.html

Wa assalaam alaikum wa rahmatullahi wa barakatuh.