Please show your solutions in paper in answering these questions. I will give you a very good feedback! In paper please :(

Box and use two decimal places for your final answers.

3. A plate capacitor having two plates with different charges- plate A (right side positive plate) and plate B (left side negative plate), is separated by a space of 4 millimeters. The electric field of the plate capacitor has a magnitude of 3.0 kV. a. Calculate the potential difference of the capacitor. b. Calculate the electric potential needed to move a proton from plate B to plate A in Joules. c. If the proton has an initial velocity of 120 km/s at plate B, calculate its velocity as it reach plate A in km/s