For a transistor with a current gain \( \beta = 56 \), the voltage drop across a \( 1.5 \, \text{k}\Omega \) resistor in the collector circuit is \( 1.5 \, \text{V} \). Determine the base current \( I_B \) in a common-emitter configuration.
1
18.76 mA.
2
18.76 µA.
3
17.86 µA.
4
17.86 mA.