憂鬱な季節【謎解き・・・？】

1:http://fast-uploader.com/file/6958126791689/2:http://fast-uploader.com/file/6958126863733/3:http://fast-uploader.com/file/6958126923350/F:http://fast-uploader.com/file/6958126952795/最終回答：https://docs.google.com/forms/d/1omjxOnJebr4oT_LTQkVG7FOfcBp6ggZfvyo4-NrlmuQ/viewform
Q：2はQ:1の答えでパスワードになります。以下同様