Determining base-emitter voltage in a CE BJT with base supplied by constant current source
Assume the transistor behaves as a diode

Ie      Vbe
1nA      0.7 - 6 * 0.06 = 0.7 - 0.36 = 0.34 volts

1uA      0.7 - 3 * 0.06 = 0.7 - 0.18 = 0.52 volts

1mA      0.7volts (assumed)

10mA     0.7 + 0.06 = 0.76 volts