Find an expression for the magnitude of the acceleration due to gravity. g(r). inside the planet.

The above soultions are what have a tried and gotten incorrect.
The hint is: Hint 1. Acceleration at the surface Hint 1. Note that the acceleration at the surface should be equal to the
value of the function g(R) from Part A evaluated
at the radius of the planet:
gp=g(Rp). g R g g R Part A Consider a spherical planet of uniform density ρ. The distance from the planet’s center to its surface (i.e., the planet’s radius) is Rp. An object is located a distance R from the center of the planet, where R< Rp (The object is located inside of the planet.) Find an expression for the magnitude of the acceleration due to gravity, g(R), inside the planet. Express the acceleration due to gravity in terms of ρ, R, π, and G, the universal gravitational constant. Submit Hints My Answers Give Up Review Part Correct Part B Rewrite your result for g(R) in terms of gp, the gravitational acceleration at the surface of the planet, times a function of R. Express your answer in terms of gp, R, and Rp Submit Hints My Answers Give Up Review Part Incorrect; Try Again; 5 attempts remaining

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I dont know why it is showing incorrect.
I got the same ans. try writing gPR/RP or
RgP/RP

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