makeup fast

Dear scholars, As-salamu `alaykum. My mother was ill and died a few days after `Eid Al-Fitr, so she could not fast. I would like to know how I can help her to be absolved from the obligation of fasting. Jazakum Allah khayran.

I decided, without knowing about the Days of Tashreeq, to complete the days of fasting I had missed in Ramadan (due to menses). Do I count the second and third days of Tashreeq that I started fasting on, or must I begin counting my days after Tashreeq?

i put to birth a month b4 ramadan,  and during the fasting i was'nt able to fast cos it very stressful. instead i fed people. i want to understand, i am still going to fast it back? or not.