And now we want to take this whole guy and plug it into our rate law for our step number two. For our slow step, we plug this guy in and we get the following our rate for the second step, the slow step is equal to k two. This guy times k one. This guy divided by k minus one. This guy times two of these because one comes from the second step and one comes from the first step times this guy. The concentration of BR two from the first step gives you this.