Wab = 4.0 × 10-6 J
Wcb = -6.5 × 10-6 J
It takes 4.0 μJ of work to move a 19 nC charge from point A to B. It takes -6.5 μJ of work to move the charge from C to B.
What is the potential difference VC−VA? Express your answer using two significant figures.