Correct answer and clear explanation please. Thank you

[0/14.28 Points] DETAILS PREVIOUS ANSWERS SERCP9 15.P.001. MY NO A 7.03 nC charge is located 1.72 m from a 3.90 nC point charge. (a) Find the magnitude of the electrostatic force that one charge exerts on the other, X Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully_N (b) Is the force attractive or repulsive? O attractive repulsive X Viewing Saved Work Revert tolLast Response [-/14.28 Points] DETAILS SERCP9 15.P.005.SOLN! MY N The nucleus of Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneously breaks into two alpha particles (helium nuclei, each consisting of 2 protons and 2 neutrons). (a) What is the force between the two alpha particles when they are 3.40 x 10 15 m apart? Z (b) What is the initial magnitude of the acceleration of the alpha particles due to this force? Note that the mass of an alpha particle is 4.0026 u. m/s2