A proton is traveling horizontally to the right at 400 x

Question

Solve the all given parts of following problem:

Problem: A proton is traveling horizontally to the right at 4.00 x 10⁶ m/s.

Part A: Find the magnitude of the weakest electric field that can bring the proton uniformly to rest over a distance of 3.50 cm.

Part B: Find the direction of the weakest electric field that can bring the proton uniformly to rest over a distance of 3.50 cm.

Part C: How much time does it take the proton to stop after entering the field?

Part D: What minimum field ((a) magnitude and (b) direction) would be needed to stop an electron under the conditions of part (a)?

Please provide clear step by step solution with notes on concepts and equations being used.