Oh.. I don't know which one of the four it is.. I just know it's in B flat minor.. Sorry, I'm really uneducated in classical piano, but I think it's all so beautiful. And I'm not a piano player.. I just wanted to know how difficult it was. After 6th months? Geez.. I'd think of that kind of passion you'd need to be eat least playing for years..
In my opinion, easiest to hardest: No.1