A Point Charge Q Is Placed on the X Axis $\mu$

A point charge Q is placed on the x axis at x = -2.0 m.A second point charge,-Q,is placed at x = 1.0 m.If Q = 60 $\mu$ C,what is the magnitude of the electrostatic force on a 40- $\mu$ C charge placed at the origin?

A) 16 N
B) 27 N
C) 32 N
D) 11 N
E) 3.0 N