Mother's health

Hello my mother lives with me and she is important figure in my life and i am very much attached to her.
Her name is Usha Rani Shrivastava
DOB: December 13, 1931 at 12 midnight in Lucknow, India
She has many health problems and has been lately very sick, had bad fall and injured in her spine and hit head on floor. she is very weak and in pain, is unable to eat anything much and appears very flat and depressed, talks about her time has come. it hurts my feelings.
i would like to know what is the chance of my mom surviving and how long? i am trying everything to take care of her.

Thanks very much
Regards
Aparna