#1
I don't know what to do with the measure in the middle, it supposed to be 4 beats per measure, i also don't understand the rest sign on top. Maybe it's obvious but somehow i just couldn't see it.
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#2
u so sillly

It's in two voices, so you have the first voice which is a chord on the downbeat that rings through the measure and then the second voice that starts with a rest and then three quarter notes.
#3
That's what i thought, but then i got confused coz looking at the C note i was thinking how can it be in both voices. u can't let it ring coz u gonna pluck it agin. So i don't know if it's a writing style only for guitar or...