That's rubbish of mediafire for blocking it and awful for you getting a strike for being helpful.
I will post what I think will come up, when I get chance to study the article, I'm making notes on the topics in the mean time.
Can someone please explain depolarisation to me, I know it isn't part of the article, but it's part of Unit 5.
(I'm an external candidate, learning from the textbook, without a teacher - so I hope people don't mind me asking).