Particle 1 carrying charge \(q\) is at the origin of an \(x y\) coordinate system, particle 2 carrying charge \(-2 q\) is at \((1,0)\), and particle 3 carrying charge \(3 q\) is at \((0,1)\). What is the angle with respect to the \(x\) axis of the electric force exerted on a particle 4 carrying charge \(q\) and located at \((2,0)\) ? (Use simple geometry and ratios.)