P13: A long coaxial cable has an inner conductor with a radius of 0.75 mm and an outer conductor with an inner radius of 3.00 mm. Assume the space between has the same permittivity as free space. a) If these conductors are charged with +5.00 nC/m (inner) and -5.00 nC/m (outer), what is the voltage difference between them? b) What is the capacitance per length of this cable? Please answer in pF/m c) How much energy is stored in 10 m of this cable? Please answer in uJ