I'm really sorry guys... I thought about the second riddle and solved it myself. I didn't know the answer beforehand, I swear.
Yes, I promise that I'll let you guys have the chance.
What I think for the latest riddle:
If I were that woman, I would call the police right after I see the guy holding the knife.
Because she lives in the apartment, I would call a relative, or a person living in the same apartment with me for help.
I could call my neighbors if they know me well.
Worse comes to worse, I'll take my belongings for self-defense. I'll fight the guy off with martial arts that I already know.