(a) Figure Q5(a) presents a specific problem. At a frequency of 200 MHz, a signal strength of -90.73 dB was received by a dipole antenna. A matching dipole is located

at 12 km away from the transmitting end. Both antennas are aligned broadside to each other and polarized for the best transmission and reception. How much power was transmitted at the transmitting end? In order to gain the full credits, you must show all the mathematical steps to demonstrate how you have reached to the required transmitted value. Also, assumptions made must be clearly stated.[16 Marks] (b) A simple one-way telecommunication system is shown in Figure Q5(b). The transmission line exhibits loss if the distance between the microphone and loudspeaker is increased. It is required to replace the lossy line with a wireless link.Compare the attenuation rate of the wireless link with the lossy transmission line assuming that the line loss at 100 meters distance is noted as 2.0 dB. Also, suggest which medium would you prefer for receiving good signal strength at a distance of6000 meters?[9 Marks]