(Solved): I am having trouble with Part (B) of this practice problem. I have tried multiple times and keep cal ...

I am having trouble with Part (B) of this practice problem. I have tried multiple times and keep calculating the wrong answer…

Charge q₁ = 8 nC is located at the coordinate system origin, while charge q₂ = 4.63 nC is located at (a, 0), where a = 1.1 m. The point P has coordinates (a, b), where b = 0.55 m. A third charge q₃ = 16.5 nC will be placed later.

(A) Find the electric potential V_p at point P, in volts. Assume the potential is zero at infinity.

The answer I got (it's correct): V_p = 134.3 ✓

(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?

Answer: W = ????????

Will upvote! Thank you :)