Solve the all parts of following problem given below:
Problem: A 3.4 x 10-6 C charge is placed at the origin of coordinates, and a -2.6 x 10-6 C charge is placed to the x axis at 3.5cm.
Part A: Find the location of the place(s) along the x axis (in cm) where the electric field due to these two charges is zero.
Part B: Find the location of the place(s) along the x axis (in cm) where the electric potential due to these two charges is zero.
Express your knowledge to solve the above problem.