For each of the following combination of parameters, determine if the material is a low-loss dielectric, a

Question:

For each of the following combination of parameters, determine if the material is a low-loss dielectric, a quasi-conductor, or a good conductor, and then calculate , , , up, and c:
(a) Glass with μr = 1, r = 5, and 1012 S/m at 10 GHz,
(b) Animal tissue with μr = 1, r = 12, and 0.3 S/m at 100 MHz,
(c) Wood with μr = 1, r = 3, and 10 –4 S/m at 1 kHz.