Consider the three point charges in the x-y plane as shown in the figure. y (cm) 90 80 70 60 50 40 30 20 10 Q1 0 Q3 Q2 0 10 20 30 40 50 60 70 80 90 x (cm) What is the total electrostatic energy of the system? The point charges have the following values: Q1 = = 5.07 nC, Q2 6.52 nC, Q3 = = -7.56 nc. Submit Answer Tries 0/12 Point charge Q3 is moved away to infinity by an external force. How much work did the external force perform in this process?