PLL Theories

Unanswered questions Part 1!

1) WHO IS CHARLES?- We know that he is Alison's brother, but what's his background. Why is he -A, who is he!?
2) Who was in Mona's house that night?- we all know she is Alive from 5x25 but we still don't know who it was in the house!
3) Who the hell hit Alison with that God Damn rock!?- We still don't know! Every time we are close to finding out all the evidence is just not fitting in!
4) Who buried Mrs.D?- Yeah, we know it's probably -A, but can we be sure? What are Charles motives? (I might be posting a theory on this! Just wait...)
5) WHO IS REDCOAT!?- We know the actual Red Coat belonged to Vivienne Darkbloom/ Alison DiLaurentis but we still don't know if she was the only Red Coat. Maybe Good and Evil? Who was the Coat who visited Mona in Radley?
6) Who is Varjak?- We never found out! Just a weird thing here, if you go on your keypad and dial Varjaks number, it spells out "Sara Harvey". Try it!
7) Who is Black Veil/ Widow? -We have seen her a couple of times but we never found out who she is.
8) Did Nate/ Lyndon ( The guy who pretended to be Maya's cousin) really kill Maya?- Emily asked him if he's gonna kill her like he killed Maya but he didn't answer. WHO REALLY KILLED MAYA?
9) Who killed Garret?-Was it Wilden and Melissa as they supposedly were the Queen of Hearts or was it -A/ Charles?
10) In the episode "Crazy" in season 3 Mona says a few phrases that were supposed to be codes. "Miss Aria, Your A Killer. Not Ezra's Wife." This code means MAYA KNEW. What did Maya know?
11) In 5x25 we see Andrew on his Laptop listening to the conversation between Mrs Hasting and Melissa. How? Does he have the same software and the same hacking skills as Mona? Why would he care about what they say?

That's it for now, I'll be posting a part 2 with 11 more unanswered questions shortly. Thanks!