The first part is the guitar lead at :21, how it keeps shifting tones and whatnot, is that a pedal or some technique? I'm really that bad that I can't figure that out.

Next, the main verse riff at :59, think there's some pinch/semi pinch harmonics in there?

Third, 1:38, is it a...

-8-9-7-6- OR -9-9-7-6-

Lastly, 3:58, I'm almost 100% sure there's pinch harmonics but I've been told by a guitarist friend in a talented and very popular band that they're not... So I dunno.

Also, if you're willing to help more, but less important, is :40 double octaves?

Thanks for all help.
Arms Of Empire
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Axe FX II + EBMM JP6 + Jackson DK2S