13. An isolated conductor of arbitrary shape has a net charge of +1.7 X 10 5 C. Inside the conductor is a cavity within which is a point charge q = +3.2 X 10 % C. What is the charge on theouter surface of the conductor? A. 3.20 x 10-6 C B. 2.02 x10 -5 C C. 6.40 x 10-6 C D. 4.04 x 10-5 C E. 1.38 x 10-5 C