A 60-(MHz) electromagnetic wave exists in an air-dielectric coaxial cable having an inner...

A 60-(MHz) electromagnetic wave exists in an air-dielectric coaxial cable having an inner conductor with radius a and an outer conductor with inner radius b. Assuming perfect conductors, and the phasor form of the electric field intensity to be

a) find k,

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b) find H from the ∇ × E equation, and

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c) find the surface current densities on the inner and outer conductors.