7. A charged particle undergoes a displacement Ar = 8.0 cm in a uniform electric field E = 35 N/C as 10 shown. 350 a. Draw the corresponding equipotential lines of the field, and indicate which ones have higher or lower potential. b. Determine the change in electric potential due to this displacement. c. If the particle had a charge of 3.0 uC, determine what its change in potential energy would have been. d. Answer the previous part by calculating the dot product of force and displacement directly. e. If the particle had a charge of -9.0 uC, determine what its change in potential energy would have been