Problem 1: Electromagnetic Plane Waves: For sea water (σ 4 (2 m); p=1;&=72): a) Determine the frequency at which the skin depth in sea water is 10 meters (assume sea water is a good conductor). b) Calculate the corresponding wavelength in sea water and compare it to the wavelength in air. For moist earth (σ =102 (2 m); = 1; &= 10) c) What are the real and imaginary parts of the propagation constant at f= 1MHz? d) What are the real and imaginary parts of the propagation constant at f=100 GHz?