YOU SAID:
what eh heck do you do here and why are you here
INTO JAPANESE
あなたはここで何をするのか、なぜここにいるのか
BACK INTO ENGLISH
What do you do here and why are you here?
INTO JAPANESE
あなたはここで何をし、なぜここにいるのですか?
BACK INTO ENGLISH
What do you do here and why are you here?
That didn't even make that much sense in English.