*6.20 We wish to investigate the operation of the npn transistor in saturation using the model of Fig. 6.9. Let I S = 10 −15 A, v BE = 0.7V, β=100, and I SC /I S = 100. For each of three values of v CE (namely, 0.4 V, 0.3 V, and 0.2 V), find v BC , i BC , i BE , i B , i C , and i C /i B . Present your results in tabular form. Also find v CE that results in i C = 0.