What Was the Initial Kinetic Energy of the Proton

Question: A proton with an initial speed of 600,000 m/s is brought to rest by an electric field.What was the potential difference that stopped the proton?What was the initial kinetic energy of the proton, in electron volts?The response must be typed, single spaced, must be in times new roman font (size 12) and must follow the APA format.