In a Bistatic radar system, the ground based antennas are separated by 4 Km and the 2.4 m2 target is at a height of 3 Km. The system operates at 5 GHz. For transmit and receive antennas gain values of 36 dBi and 20 dBi, determine the minimum necessary radiated power to obtaina return power of 8 x 10-12 Watts