Coulomb's Law: in the Figure Q = 5

Coulomb's law: In the figure Q = 5.8 nC and all other quantities are accurate to 2 significant figures. What is the magnitude of the force on the charge Q? (k = 1/4πε₀ = 8.99 × 10⁹ N ∙ m²/C²)

A) 1.8 × 10^-3 N
B) 1.0 × 10^-3 N
C) 9.0 × 10^-4 N
D) 1.2 × 10^-3 N