problem start) Points A,B, and C are the vertices of an equilateral triangle of side length r. Charges Q_(A),Q_(B), and Q_(C) are added at the respective vertex. The three charges can be chosen to be either +-2\mu C or +-4\mu C, not necessarily all different. Note that 1\mu C=10^(-6)C. NOTE: Think about the el ciangle and at each vertex. How does the electric fiel(d)/(v)oltage at each of these locations depend on the charges? Can they ever be zero? How does the force on each charge depend on its own value? What about de force dependence on the other charges? Which quantities are scalars and which are vectors? How would you take direction into account?