I think you should give up your seat to the old lady as she might have a bad back and she could fall down when the train suddenly stops. Also, she might get pushed if at one stop, a lot of people get in. Another thing is that her life is coming to an end so you should give her an easy time. And if she has a bad back ( I’m talking about my first sentence) one hand will be on her back and the other will be holding the walking stick. She can’t hold the handrail.