How To Make Up For Missed Fasts

If a person did not fast at all in Ramadaan, does he have to make up 30 days or the number of days that were in the month?

He fasted the day of ‘Arafah with the intention of making up a day from Ramadaan

Should he fast on behalf of his father who died in Ramadaan?

Her sickness had no hope of a cure then Allaah healed her

She fell unconscious in Ramadan then she died

He broke the fast on several days because of the secret habit

She does not remember whether she made up the days that she owed or not

She claims that there is no evidence that a woman who menstruates has to make up missed fasts

If a person breaks his fast on a day when he was making up a missed fast, does he have to fast three days?