I want to ask whether the children of a deceased person can fast on his behalf or pay fidyah for the fast he failed to observe. The deceased did not fast during Ramadan except for a few years in his lifetime. And when he realized he should he was no more able to accomplish that due to severe illness. Now his children want to keep fasts on his behalf or pay the fidyah. Is that possible for them? Will the deceased get the reward and be exonerated from his failure to fulfil this important religious duty?