A cylindrical air capacitor with a length of 132m stores an

Question

Compute all parts of given problem:

Problem: A cylindrical air capacitor with a length of 13.2m stores an amount of energy equal to 3.20×10⁹J when the potential difference between the two conductors is 4.80V.

Part A: Calculate the magnitude of the charge on each conductor.

Q=________ C

Part B: Calculate the ratio of the radii of the inner and outer conductors.

r(in)/r(out) = _________

I need help to find the ratio of the radii of the inner and outer conductors.