Is it obligatory for a woman who has to make up days from Ramadan to first fast these days, and then feed the poor? And is feeding the poor done by feeding ten poor people for each day, or one poor person for ten days?

If a woman demands to make up for days missed in Ramadan, she must hasten to make them up before the next Ramadan. If she does not do so without a valid excuse until the next Ramadan arrives, then she must both make up the days and pay a fidyah (expiation). The fidyah is one mudd (a measure of food) for each day. It is permissible to give the fidyah before making up the days, or concurrently with it, or after it.