(8%) Problem 9: The electric potential in a certain area varies with position as V(x) - ax - bx + c, where a - 3.9 V/m , b - 16 V/m, and c = 12.5 V. d ed A 20% Part (a) Find the electric field vector E in this area in terms of the given variables. Be sure to include a unit vector for direction. 20% Part (b) What is the magnitude of the electric field, in volts per meter, at x - 1.0 m? A 20% Part (c) What is the direction of the electric field at x - 1.0 m? A 20% Part (d) What is the magnitude of the electric field, in volts per meter, at x - 5.0 m? DA 20% Part (e) What is the direction of the electric field at x - 5.0 m? Right . Left Grade Summary Deductions 0%