My father has not prayed for a year because he does not have full mental capacity. Do we make up the prayers he missed over the past year on his behalf?

Question:
Honorable Shaykh, may Allah grant you success. He says: My father has been ill for three years. Sometimes he is mentally aware, and sometimes his mind becomes confused. Last year, he fell and broke his thigh, and he cannot do anything without his mother's help. He has not prayed for a year because he sometimes lacks mental awareness in certain matters. His question is: How should the father pray, O Shaykh? And do we make up the prayers he missed over the past year, or the past two years, on his behalf?

Answer:
If his mind remains intact, he prays according to his condition. Fear Allah as much as you are able. He prays with wudu' (ablution) or tayammum (dry ablution), standing, sitting, on his side, or lying on his back, according to his ability. Fear Allah as much as you are able. However, if his mind has gone and he does not retain any awareness, then no prayer is required of him. Yes.