(8%) Problem 4: Charge q1 = 11 nC is located at the coordinate system origin, while charge q2 = 1.55 nC is located at (a, 0), where a = 1.5 m. The point P has coordinates (a, b), where b = 0.65 m. A third charge q3 YA P = 16.5 nC will be placed later. (a, b) 91 33% Part (a) Find the electric potential Vp at point P, in volts. Assume the potential is zero at infinity. Vp = sin() cos tan 7 8 9 HOME cotan() asin() acos() A A 5 6 atan() acotan() sinh() 2 3 cosh() tanh() cotanh() + 0 END Degrees O Radians VO BACKSPACE DEL CLEAR Submit Hint Feedback I give up! A 33% Part (b) How much work W, in joules, would you have to do to bring the third charge, q3, from very far away to the point P? A 33% Part (c) What is the total potential energy U, in joules, of the final configuration of three charges