Ramadhaan & Fasting

Q: About 8 years ago, I had sexual intercourse with my wife while fasting in the month of Ramadaan. I didn't know that time if this was a violation or haraam or if there is any kaffara that needs to be paid. Later I have realized that I might've made a mistake or committed a sin. So I would like to ask what shall I do now? Is there any kaffara that needs to be paid r just ask forgiveness from Allah?

Q: Dad was ill in hospital and shortly after he got admitted he passed away. He did not give wasiyat for his missed fast and salaah, so I've taken it upon myself to fulfil some sort of kaffarah (fidyah) on his behalf, and insha'allah Allah will accept.

In terms of spending the kaffarah (fidyah), there is a young baligh male who is from a poor family and needs to sort out his final year of studies in order for him to get his degree/diploma in order to move forward with his life.

Is it possible for me to give him the money or a 3rd party who is currently financially responsible for his payments to pay off his final year of studies?

Q: If one breaks his fast for "sports" activities, will qadha or kaffarah have to be kept?

Q: If one is fasting a qadhaa fast and during the fast one touches a food item, while cooking, which has some flour on it and then licks the finger, instinctively and unintentionally - will it have broken the fast if one did not wash out the mouth thereafter?