The distance from each charge to point Q is shown on the figure below. Two positive charges, qA=+2μC and qB=-5μC, are located at points A and B as shown.
![1529_Distance from each charge to point Q.png](https://secure.tutorsglobe.com/CMSImages/1529_Distance%20from%20each%20charge%20to%20point%20Q.png)
(a) Calculate the total electric potential at point Q.
(b) Calculate the electric potential energy of this system of charges?