Please help short answer is fine

1. Using the appropriate equation from the Introduction, calculate the work done on a charge q = 1.0 u C as it is moved from a point on the 4V line to the 14V line. 2. Using the appropriate equation from the Introduction, calculate the magnitude of the force on a charge q = 1.0 u C placed somewhere on the 14V line. What is the direction of this force? 3. If you repeated the experiment with a -InC charge at the center rather than the positive charge, how would the magnitude and direction of the electric field E , and the values of the potentials a the equipotential lines change