We have stage two that consists of two steps. And we have the most complex stage, stage three, that consists of five steps. Now, the reason we break down glycolysis into these three stages is because each one of these stages actually carries out its own specific purpose. It has its own specific purpose, it carries out a specific function. So let's begin with stage one. In stage one, the entire point of stage one is to take that glucose molecule, trap that glucose molecule inside a cell so that it can't actually leave that cell, and begin preparing that glucose molecule for cleavage, which takes place in stage two.