A +50-µC Point Charge Is 12 Cm from a -5 $\vec { E }$

A +5.0-µC point charge is 12 cm from a -5.0-µC point charge.What is the magnitude of the $\vec { E }$ field they produce at the point on the line connecting them where their electric potential (relative to infinity) is zero? (k = 1/4πε₀ = 9.0 × 10⁹ N ∙ m²/C²)

A) 0 N/C
B) 12.5 MN/C
C) 0.75 MN/C
D) 25 MN/C
E) 1.5 MN/C