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The gravitational field at the surface of Planet $X$ is $10$ $N/kg$ and the gravitational field at the surface of Planet $Y$ is $5$ $N/kg$.

Which of the following MUST be true?

Select TWO answers.

The Mass of Planet $X$ is twice the mass of Planet $Y$.

The weight of a $50$ $kg$ object on Planet $X$ is $500$ $N$.

The acceleration of gravity on the surface of Planet $X$ is twice the acceleration of gravity on the surface of Planet $Y$.

The radius of Planet $Y$ is less than the radius of Planet $X$.