P.9-10 It is desired to construct uniform transmission lines using polyethylene (€, = 2.25) as the dielectric medium. Assuming negligible losses, (a) find the distance of separation for a 300 (2) two-wire line, where the radius of the conducting wires is 0.6 (mm); and (b) find the inner radius of the outer conductor for a 75 (2) coaxial line, where the radius of the center conductor is 0.6 (mm).