So let's begin with the s orbital. So the s orbital, which is one of the solutions to the wave equations, is given by the spherical shape. So this sphere is the s orbital. And what it basically states is that our electron is most likely in this sphere here. Now, of course, as we're talking about probabilities, there is still a probability that our electron will be found outside this spherical shape. But it's very unlikely and that's why we say it's most likely in this orbital.