Solve the all parts of following problem:
Problem: The electron gun in an old TV picture tube accelerates electrons between two parallel plates 1.3cm apart with a 20kV potential difference between them. The electrons enter through a small hole in the negative plate, accelerate, then exit through a small hole in the positive plate. Assume that the holes are small enough not to affect the electric field or potential.
Part A: What is the electric field strength between the plates?
Part B: With what speed does an electron exit the electron gun if its entry speed is close to zero?
I need help to solve the above question and express your answer to two significant figures and include the appropriate units.