A Metal Sphere of Radius 2 $\mu$ C What Is the Electric Field 6

A metal sphere of radius 2.0 cm carries a charge of 3.0 $\mu$ C. What is the electric field 6.0 cm from the center of the sphere?

A) 5.7 × 10⁶ N/C
B) 4.2 × 10⁶ N/C
C) 9.3 × 10⁶ N/C
D) 6.4 × 10⁶ N/C
E) 7.5 × 10⁶ N/C