The ruling on feeding on behalf of an elderly mother who has lost her mental capacity

The questioner:
We have Abu 'Abd al-Rahman from Abha with a set of questions. Peace be upon you.

Another questioner:
Peace be upon you.

The presenter:
Please proceed.

Another questioner:
Four questions. May Allah keep you safe.

The presenter:
The first question is brief.

Another questioner:
The first question: My mother is elderly and has been bedridden in the hospital for two years. She does not know anything and is unable to fast. I do not know whether she has to provide food or not. The second question: Does shaking hands with one's wife, for example, invalidate the ablution?

The presenter:
Shaking hands with the wife from the husband.

Another questioner:
Shaking hands with an elderly woman, for example, one's uncle's wife. If I visit them and shake hands, for example, with my uncle's wife, does it invalidate the ablution? Now, the fourth question: I entered the mosque and there was a group of two or three, and one person was praying alone. Do we follow him, or do we pray the Friday prayer on our own?

The presenter:
Thank you, thank you, O 'Abd al-Rahman. Her mother, O Shaykh Salih, is old in age, does not understand anything, and does not know the prayer. Is there an expiation or food required of the children?

The Shaykh:
If she does not perceive things and does not understand things, then she owes nothing, because this follows the intellect. As long as the intellect is deficient or absent, she owes nothing. Yes.