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4. [20] Two protons are separated by a distance 2a C =20 nm. At an initial time t = 0, an electron is located 10 nm above the line AB drawn between the two protons on the line CD bisecting line AB. At this time, the electron is moving along line CD 7 Na - at an initial speed of vi = 50 km/s in the direction of A o C a (a) [6] Give a qualitative description of the motion of the electron after f = 0. (b) [4] What are the potential energy and the kinetic D energy of the electron at the initial time, = 0? (c) [4] What is the maximum potential energy of the electron, /iy, as it moves? (d) [6] What is the maximum speed Vg, of the electron during it motion