What are the rules of Nunun sakinah, tanwin, idgham and izhar?

Question
What are the rules of Nunun sakinah, tanwin, idgham and izhar?

Answer
Assalaam alaikum wa rahmatullah.
You can find all the rules of noon saakinah and tanween at the following link:
http://www.abouttajweed.com/the-noon-saakinah-and-tanween/index.php
Wa assalaam