For some reason I can't find the most basic informations xD

There's a thing that your cobs are too young to be sold, right?
1. when are they old enough to be sold without their mother?

2. can you kill/chase/nature reserve/abandon a cub any age or does it have to be old enough?

3. do cubs need a broodmother right after birth or only after they are separated from the mother? (certain age)

4. at what age are cubs separated from the mother in the den / lion view? (younger ones show under their mother and older ones are in a lower section)

5. at what age cubs start to have needs like playing and hunger? (I looked at mine and I am confused about the age)