Compute all parts of given problem:
Problem: A charge B with Qb=-2 x 10-19 C and a dipole with charges +q and -q separated by s=0.05mm contribute to a net electric field that vanishes completely at location A.
Part A: Calculate the magnitude of charge q. (Draw a diagram)?
Part B: What is the electric force on a positive charge of Q=+2 x 10-5 C placed at position A?
I will only give best answer if all the steps are shown and correct. Thanks!