The components of ordinary gunpowder are elemental sulfur

Question

The components of ordinary gunpowder are elemental sulfur, charcoal, and potassium nitrate. When gunpowder explodes, these components react as follows:

3S₈(s) + 16C(s) + 32KNO₃(s)→

Sulfur Carbon Potassium nitrate

16K₂O(s) + 16CO₂(g) + 16N₂(g) + 24SO₂(g)

Potassium oxide Carbon dioxide Nitrogen Sulfur dioxide

For this redox reaction, the reducing agents are __________ and __________.