The electric field at a distance of 0.159 m from the surface of a solid insulating sphere with radius 0.369 m is 1750 N/C.

a) Assuming the sphere's charge is uniformly distributed, what is the charge density inside it?

p= _____ c/m3

b) Calculate the electric field inside the sphere at a distance of 0.215 m from the center.

E = _________ n/c

Please be clear with your answer

thank you