10 units of food is available
There are 4 children to a parent.
There is 1 weak child, and the child will become strong on eating 4 unit of food.
There are 3 strong children among the 4, and the 3 strong children will remain the way they are on eating 2 units each.
What should be the duty of the parent?
What should be the duty of the weak child?
What should be the duty of the strong children?