The Student Room Group
Many many words.

Honestly, the amount you can write in 30 mins probably, unless you write incredibly slowly. Spend 30 minutes writing at average speed and you should get there.
More than 10.
13.3 words per mark, therefore 399 words.
30
Reply 5
As many as is required to answer the question.
personally i would say around 700, just to make sure you have fully explain every point you have made, but try to be concise. hope that helps