A BJT is operated in a 50ohm circuit 1.5Ghz. FOr the bias conditions of Collector Current - 4mA and Collector-Emittor Voltage = 10V. The manufacturer provides the S-parameters in magnitude and angles (in degrees) as follows. S11 = 0.7 < -127 S21 = 3.88< 87 S12 = 0.039 <28 S22 = 0.76 < -35 Find the Z-parameters representation for this circuit.