#1
e|------------------------|
B|------------------------|
G|--4r--2h4p2h4p2h4p2
D|---------------------0--|
A|------------------------|
E|------------------------|

When you play this piece what does the r after the 4 mean, or in other words how is this played (just the first pluck)?
#2
Hmm, If there's a key on the tab, you should take a look at that, but my best guess is it's a reverse bend(Not sure this is the propper term), bend the fourth fret up before plucking then release it back to 4

I'm not sure.