In my opinion... 3, 1, 2
3. Your essay should already be prepared and practiced. You should know exactly what you would like to say, knowing points and quotes. All you have to do is answer the question. This is the area you will have been studying the most for if at all, so you should attempt this first while it's still fresh in your mind.
1. Simply for the reason that after reading these and answering these, you may find ideas that can help you with your second question.
2. Whilst the first part is still in your short-term memory bank it's best to jot down your ideas and prepare your story. You should already have a vague idea in mind, all you need to do is adapt it to answer the question.
Again, this is my personal opinion. I see no flaws in it.