The electric field at a distance of 0148m from the surface

Question

Solve the all parts of given question:

Question: The electric field at a distance of 0.148m from the surface of a solid insulating sphere with radius 0.378m is 1710N/C.

Part I: Assuming the sphere's charge is uniformly distributed, what is the charge density inside it?

(in C/m³)

Part II: Calculate the electric field inside the sphere at a distance of 0.198m from the center.

(in N/C )

Please show all work and explain your methods for above question.