A proton of mass \(m\) and charge \(+e\) is constrained to move along the \(x\)-axis in a region where the electric potential \(V(x)\) is shown in the graph. At position \(x = 1.0\text{ m}\), the proton has a kinetic energy of \(2.0e V_0\) and is traveling in the \(+x\)-direction. What is the maximum speed achieved by the proton during its subsequent motion?