15. For the network of Fig. 9.80: a. Determine re. b. Find Ayid Vo/Vi c. Calculate Zi. d. Determine fife and fig e. Determine the low cutoff frequency. f. Sketch the asymptotes of the Bode plot defined by the cutoff frequencies of part (d). g. Sketch the low-frequency response for the amplifier using the results of part (e). 0.47 F 0.47 F 14 V Cw Cwo = 5pF Che 8 pF C = 12 pF 40 pF 68 10 5.6 0.47 F B = 120 HH Cce = 8 pF 3.3 1.2 20 F FIG. 9.80