please help me with this question

Part A The two vertical metal plates (see the figure) are oppositely charged a) Which plate, left or right, is the positive plate. Justify your answer. OV 300 V b) Find the magnitude and direction of the electric field between the plates. Sketch 3.0 mm O the electric field lines between the plates. Include in your Blackboard submission. A proton follows the trajectory shown in the figure. c) Find the magnitude and direction of the electric force acting on a proton. 00 d) Does the speed of the proton increase or decrease as it moves from point A to point B? Justify your answer. e) If the speed of the proton at point A is 1.96 x10 m/s, how fast is the proton moving at point B? 100 V 200 V 9p = -1.6x10-19 C mp = 1.67x10-2 kg Express your answer with the appropriate units