Two Point Charges of +2

Multiple Choice

Two point charges of +2.00 μC and +4.00 μC are at the origin and at the point x = 0.000 m,y = -0.300 m,as shown in the figure.What is the electric potential due to these charges,relative to infinity,at the point P at x = 0.400 m on the x-axis? (k = 1/4πε₀ = 8.99 × 10⁹ N ∙ m²/C²)

A) 117 kV
B) 15.7 kV
C) 11.7 kV
D) 56.0 kV
E) 36.0 kV