Method 1

First Part.

G:--------------|
D:-12-----------|
A:----12-7-10-8-|
E:--------------|

Second Part.

G:------8-------9-|
D:-10-8---10-10---|
A:----------------|
E:----------------|

I think that the first method is the easiest.
Method 2 is more for beginners.


Method 2

First Part.

G:-----------|
D:-----------|
A:-5---------|
E:---5-0-3-1-|

Second Part.

G:---------------|
D:-----1---------|
A:-3-1---3-3-2/7-|
E:-----------0~~-|

~ = Hold note
/ = Slide