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

The distance of separation between two point charges is doubled? What happens to Coulomb force?

The distance between the two plates of capacitor is doubled and the area of each plate is halved. What happens to the capacitance? (write the answer only)

The force between two parallel current carrying conductors separated by a distance x is F. If the current in each conductor is doubled and the distance between them is halved, then the force between them becomes