Consider a two-wire transmission line made of two copper rods. The copper rod has a conductivity of 5.8107 S/m and radius of 1.25 mm. The center-to-center distance between the rods is 4 mm. (i) When the two-wire transmission line is placed in air, calculate its complex propagation constant, characteristic impedance at 300 MHz. (ii) When this two-wire transmission line is placed inside sea water (ur=1, &r=81, od=4 S/m), calculate its complex propagation constant, characteristic impedance at 300 MHz. (iii) Determine and compare the attenuation of this 100 km cable when operating at 300 MHz and placed in air and sea water, respectively.