If the distasnce between the two point charges is doubled then what will be percentage change in the force?

If the distance between two point charges is doubled and magnitude of charges are also doubled, the Coulomb's force between them will be

A charge Q exerts a 12 N force on another charge q. If the distance between the charges is doubled, what is the magnitude of the force exerted on Q by q?

If the distance between two point charges is doubled and their individual charges are also doubled, what would happen to the force between them.

If the masses and mutual distance between the two objects are doubled, what is the change in the gravitational force between them?