Solve all given parts of following problem:
Problem: Two point charges are separated by 25.0cm.
Part A: Find the magnitude of the net electric field these charges produce at point A.
Part B: Find the magnitude of the net electric field these charges produce at point B.
Part C: What would be the magnitude of the electric force this combination of charges would produce on a proton at A?
Please show work on how to solve above problem!