Ahertzian dipole antenna in free space has l =0.02x. the following are in far-field: (a) what value of current i is necessary to radiate total power of 60 mw? a. (b) what is the ratio of the magnetic field intensity, h at the polar angles 0 = 10 degrees and 80 degrees (c) what fraction of the total radiated power is contained in the region 0 < 60 degrees (d) what is the radiation resistance, rrad?