A sphere with radius 0.200 m has density ρ that decreases with distance r from the center of the sphere according to
ρ = 2.50 × 10^3 kg/m^3 - (8.50 × 10^3 kg/m^4) r.
A) Calculate the total mass of the sphere.
B) Calculate the moment of inertia of the sphere for an axis along a diameter.