Draw a circuit diagram of an n-p-n transistor amplifier in CE configuration. Under what condition does the transistor act as an amplifier?

The circuit diagram of an n-p-n transistor amplifier in CE configuration is given. The transistor behaves as an amplifier when the input circuit (emitter - base) is forward biased having low voltage VBB and the output circuit (collector - base) is reverse biased having high voltage VCC.