A system has two charges  ${\mathrm{q}}_{\mathrm{A}}=2.5\times {10}^{-7}\mathrm{C}$ and ${\mathrm{q}}_{\mathrm{B}}=-2.5\times {10}^{-7}\mathrm{C}$located at points A(0,0,–15 cm) and B:(0,0,+15cm), respectively. What are the total charge and electric dipole moment of the system