Q.Write the steps involved in drawing AC equivalent circuit of an amplifier.

The AC equivalent circuit shows only what the signal 'sees', so DC sources and capacitors are treated specially. …

[!TLDR]

Short $V_{CC}$ to ground, short all capacitors, use the transistor AC model.

To analyse how an amplifier responds to a signal, we draw its AC equivalent circuit, which represents the circuit as seen by the AC signal only. The steps are: first, since a DC supply is a constant voltage, it offers zero impedance to AC, so the $V_{CC}$ point is connected (shorted) to ground; second, the coupling and bypass capacitors have negligible reactance at signal frequencies, so they are replaced by short circuits; third, the transistor is replaced by its small-signal AC model. What remains — the biasing resistors, load and transistor model, arranged accordingly — is …