We take this molecule that is high in energy, so it contains very active bonds and that makes it a very good molecule that actually transfers that phosphoral group onto ADP. And so in the presence of ADP and H plus, we take this molecule and by the action of Pyruvate kinase so again, we form Pyruvate in the last step and this reaction is a phosphorylation reaction. So we're using a kinase and we form the Pyruvate in the ketone state and that ATP molecule. And because this process takes place twice, we form two ATP molecules here. We form two ATP molecules here. So a total of four ATP molecules in stage five.