Let S be the part of the sphere x + y + z = 25 that lies above the plane z = 4. Let S

Let S be the part of the sphere x² + y² + z² = 25 that lies above the plane z = 4. Let S have constant density k.(a) Find the center of mass.(x, y, z) = __(b) Find the moment of inertia about the z-axis.I? =