A Point Charge Q Is Placed at the Origin $\mu$ C,what Is the Magnitude of the Electrostatic Force on a Charge,2Q,is

A point charge Q is placed at the origin.A second charge,2Q,is placed on the x axis at x = -3.0 m.If Q = 50 $\mu$ C,what is the magnitude of the electrostatic force on a third point charge,-Q,placed on the y axis at y = +4.0 m?

A) 2.5 N
B) 3.0 N
C) 3.7 N
D) 4.4 N
E) 1.8 N