A gravitational force F attracts two objects with masses M toward each other when they are separated by a distance R

1. What would this force e changed to if the mass of BOTH objects were changed to 4M?
1. 4F
2. F/4
3. 16F
4. F/16

2. What would this force be changed to if the distance between the two objects were to be quadrupled?
1. 4F
2. F/4
3. 16F
4. F/16