Solve the given parts of following question:
Question: Two 10-cm-diameter charged rings face each other, 18cm apart. The left ring is charged to -26nC and the right ring is charged to +26nC.
Part A: What is the magnitude of the electric field E at the midpoint between the two rings?
Part B: What is the magnitude of the force F on a -1.0 nC charge placed at the midpoint?
Please provide me complete solution for the above question so I can get right solution.