A spherical conductor with a radius of 0.5 m carries a total…

A spherical conductor with a radius of 0.5 m carries a total charge of 5 × 10-6 C. A point charge of 2 × 10-6  C is placed at its center. What is the magnitude of the electric field at point A that is located at r = 0.4 m from the center of the sphere (in N/C)?