write ,saying first that you hope all is well with him and his people. Then describe what has happened to your father, try not to make it too long. Then finish by saying “I know that my father would benefit from your help as an old friend, and hope you are able to meet this difficulty with him.”
I hope all goes well. You clearly are a caring son. Well done!
Probably really help them out with money & financial needs. It’s upsetting seeing them be tired and exhausted at the end of the day and they can’t even relax bc of responsibilities :(