I need help with 11 and 12 plsss?

1 1. II An electron with an initial speed of 500,000 m/s is brought to rest by an electric field. a. Did the electron move into a region of higher potential or lower potential? b. What was the potential difference that stopped the electron? c. What was the initial kinetic energy of the electron, in elec- tron volts? C 12. II An electrophoresis gel rests between two parallel plates; the BIO potential difference between the plates is 50 V. Each second, 50 mC of charge moves through the gel. What is the increase in thermal energy of the gel in 1.0 minute? 13. III A proton with an initial speed of 800,000 m/s is brought to rest by an electric field