Bungou stray dogs memes

Questions from bsd

So..I recently finnished bungou stray dogs and...I got some questions.Uf you made this far,you probably can answer to my questions...please

1.At the end of season 3,Ranpo escaped from that book,but how about Chuuya?Did he escaped too?Is he still in that book of mysterys??

2.Why Akutagawa is coughing blood?(from season 1 and 2)My theory is that he coughs blood because of his gifted power?Please correct me if i am wrong

3.How many years said Dazai that he wants to suicide but hes still alive?

4.And the most important question...If atsushi have felline powers,that means hes a neko?