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- 1. Calculate the dot product of vector A = 2i - 3j and B = 4i + 2j. O A. 2 OB. 14 O C.3 OD. 11Describe your approach to determining the distance between the electron and proton in an atom if the potential energy U of the electron is known to be 14 eV. а. Use the law of conservation of energy. b. Use Coulomb's law. С. Use the definition of electrostatic potential energy U of one point charge q at position r in the presence of an electric potential. d. Use Newton's second law.In the figure shown if A=5.0, B=8.0 and x=30degrees, determine the scalar product of the two vectors shown.