A proton enters a parallel-plate capacitor traveling to the right at a speed of 1.277 \times 10^-5 m / s, as shown in the figure. The distance between the two plates is 1.63 cm. The proton enters the capacitor halfway between the top plate and the bottom plate; that is, a distance r=0.815 cm from each plate, as shown in the figure. The capacitor has a 2.90 \times 10^-4 N / C uniform electric field between the plates that points downward from the top plate to the bottom plate. Neglecting gravitational forces, what horizontal distance does the proton traverse before the proton hits the bottom plate? m