#1
it goes something like this:

-------------------------
-------------------------
-------------------------
-7---5------------------
---------7----5/4------
---------------------5--

i've only heard the riff for a few seconds so im not sure if it's is exactly like this.
#2
Can you name the genre and maybe how fast the riff is played?

It will be most likely wrong but let's try it:
What about Seek and destroy by Metallica?
#5
You really are going to have to give us more info than that.

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