Dry soil is characterized by r = 2.5, r = 1, and 0 4 (S/m). At each of the following frequencies, determine if dry soil

Dry soil is characterized by r = 2.5, μr = 1, and 0 –4 (S/m). At each of the following frequencies, determine if dry soil may be considered a good conductor, a quasi-conductor, or a low-loss dielectric, and then calculate , , , μp, and c:
(a) 60 Hz,
(b) 1 kHz,
(c) 1 MHz,
(d) 1 GHz.