Answer:
![\begin{gathered} a)\text{ Force is multiplied by 2} \\ b)\text{ Force is reduced to 1/4 of the original} \end{gathered}](https://img.qammunity.org/2023/formulas/chemistry/high-school/j22iupyl6nucrpcp7kpeursrg8opvloqrh.png)
Step-by-step explanation:
Here, we want to get the effect of the change on the force
When one of the masses is multiplied by 2, it means the entire force will be multiplied by 2
In a case where the distance is halved, the force is decreased by a factor of 1/4