Candle Challenge...Last one is impossible!

Try this candle challenge and see if you can guess the correct order the candles go out in. Let me know in the comments how many you get right and why we see the results we do. Remember what happens in a combustion reaction! Wax + Oxygen produces Carbon dioxide and Water. How does that help us figure out what is going on. Also think about convection currents and buoyancy of gases at high and low temperatures!