A Point Charge (-5 $\mu$ C)is Placed on the X Axis at X = 4

Multiple Choice

A point charge (-5.0 $\mu$ C) is placed on the x axis at x = 4.0 cm,and a second charge (+5.0 $\mu$ C) is placed on the x axis at x = -4.0 cm.What is the magnitude of the electric force on a third charge (+2.5 $\mu$ C) placed on the y axis at y = 3.0 cm?

A) 90 N
B) 45 N
C) 54 N
D) 72 N
E) 36 N