And the vital capacity is equal to about 4800 air per breath. So essentially, if we forcefully exhale our air, we're going to end up in this region. And then if we try to actually forcefully inhale as much air as possible, we're going to go from this location all the way to this location and the amount of air that will be exchanged by the lungs during that process is equal to 4800. So this line is about 1200. This line is 6000. Taking the difference gives us 4800 ML.