Extensive Form Representation Question: Represent the extensive form of the game:

Suppose, Nature chooses either Up or Down with probabilities 0.5 and 0.5, respectively. 

Then Player 1 chooses either Right or Left and does not observe nature's choice. 

Finally, Player 2 chooses either G or H. Unlike Player 1, Player 2 observes the choice of Player 1 prior to making his choice. Player 2 also observes nature's choice if Player 1 has chosen Right but does not observe nature's choice if Player 1 has chosen Left. 

My take: 


Is this correct? I am not really sure about the instructions in bold.
Imagine you're Player 2. What different "scenarios" could you find yourself in?


If Player 1 chooses Right, then Player 2 could observe if Nature played Up or Down. So you have 2 information sets there.
If Player 1 chooses Left, then Player 2 couldn't differentiate between (Up, Left) and (Down, Left). How many information sets should there be here?


So in total, you should have how many information sets? You currently have 4. Which one should you "combine"?