A) For the network shown in Figure 1, i) Determine Ter ii) Find Z,(with ro = 002), iii) Calculate Z,(with T. = 002), iv) Determine Ay(with r, =co), v) Repeat parts iii) and iv) including ro - 50k2 in all calculations and compare results. Z QUESTIONS 10F 460ks 2ks2 10F B=100 12V Figure 1: Circuit for Question One A) Zo V 10 Marks B) Explain the basic operating principle of a Bipolar Junction Transistor (BJT) and with illus- trations explain its application in alternating current (AC) circuits. 5 Marks