2. (a) Calculate the skin depth and absorption loss for a brass shield 0.062 in thick at the following frequencies: a. 0.1 kHz, b. 1 kHz, c. 10 kHz, and d. 100 kHz?(b) Calculate the shielding effectiveness of a 0.015-in-thick copper shield located 1 in from the source of a 10-kHz magnetic field.