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2.) A pair of conductors are modeled as a transmission line with per-unit-length parameters L and C, propagation velocity up, and wavelength A. The length of the conductors is 1 = 3X/4, which means the time-of-flight from one end to the other is td = 1/up. Answer each of the following questions. Briefly explain your answer. (20 points) (a) The frequency of operation is reduced by a factor of 10. What is length of the conduc- tors in terms of the new wavelength? (b) Should the conductors continue to be modeled as transmission lines with this new frequency of operation? (c) Now, the conductors are used for a digital transmission. The rise time of the source driving the conductors is t, Should the conductors be modeled as transmission = . 10Up lines in this case? (d) The pair of conductors was held apart by a spacer, similar to the twin-lead conductors in lecture. The spacer was changed such that the conductors are half the distance apart as original. Have the the per-unit-length parameters changed? Has the propagation velocity changed?