Me and my group are doing a design project right now and we are a little stuck on the question, ok very stuck. The question is to:

Design a multi-stage audio amplifier for delivering an average power of 400 mW to a 16 Ohm speaker from a microphone that produces a 10 mV peak sinusoidal signal and has a source resistance of 1 kW. Use standard NPN QN2222 for your design. Analyze the frequency response for the amplifier as well. Design such that the upper 3 dB frequency is at least 100 kHz, and lower cutoff frequency below 20 Hz. Input resistance needs to be atleast 10 kΩ.

We were thinking of making a 2 stage amp but now we are rethinking the idea and going for a 3 stage. We are not very sure on where to start so any help would be very appreciated.

Thanks alot.