Two Point Charges of +20

Multiple Choice

Two point charges of +20.0 μC and -8.00 μC are separated by a distance of 20.0 cm. What is the magnitude of electric field due to these charges at a point midway between them? (k = 1/4πε₀ = 8.99 × 10⁹ N ∙ m²/C²)

A) 25.2 × 10⁶ N/C directed toward the negative charge
B) 25.2 × 10⁶ N/C directed toward the positive charge
C) 25.2 × 10⁵ N/C directed toward the negative charge
D) 25.2 × 10⁵ N/C directed toward the positive charge
E) 25.2 × 10⁴ N/C directed toward the negative charge