In the picture shown, two charges Q =+ 10 µCare fixed in place at y =+ Land y =- L respectively. L = 1. 0 m Find the electric potential

at points A (x = 2L)and B (x = 4L). b. Suppose that a proton (q = 1.6 × 10¯19C,m = 1.67 × 10-27kg) is initially at point B moving to the left with a velocity when it reaches point A, and the closest distance to the origin before the proton turns around.C.