Using the characteristics of Fig. 3.7, determine VBE at IE = 5 mA for VCB = 1, 10, and 20...

Using the characteristics of Fig. 3.7, determine V_BE at I_E = 5 mA for V_CB = 1, 10, and 20 V. Is it reasonable to assume on an approximate basis that V_CB has only a slight effect on the relationship between V_BE and I_E ?

FIG. 3.7 Input or driving point characteristics for a common-base silicon transistor amplifier.