A Hertzian dipole of length Äl = 0.6 mm in air carries a current of Io = 10 mA at a frequency of 10 GHz. The antenna is located at the coordinate origin and the antenna current is oriented along the z-axis. Determine (a.) the electrical length of the antenna (b.) the far field phasor electric and magnetic field magnitudes at the spherical coordinate point P defined by (R = 20ë, è = 90o, ö = 90o) (c.) the time-average vector power density at the point P (d.) the total power radiated by the antenna (e.) the radiation resistance of the antenna.