Is Iddah (waiting period) incumbent on an old lady whose husband had died?
Upon the death of the husband, Iddah is incumbent on the wife regardless of her age.
Is it permissible for a woman who broke fasting due to delivery to pay a ransom ?
She should make up for the missed fasting days once she becomes ritually pure, but it is impermissible for her to pay a ransom while being able to fast.
Is it permissible for a woman who is observing `Iddah(waiting period) due to the death of her husband to travel for performing Umrah(Minor Hajj)?
A woman observing `Iddah of a revocable(Rajee`) divorce isn`t allowed to travel for Umrah except with the consent of her husband.
What should a sick person, who is incapable of fasting, and who didn`t make up for missed fasting days, do?
One who has missed fasting days is obliged to make up for them, but if he/she wasn`t able to because of an incurable disease , or old age, then he/she has to pay a ransom which is feeding a needy person for each of the missed fasting days.