If M equals one, that means our L equals zero. So that means our subshale must be S. And that means that if this was our proton, there is a 90% chance, 90% probability that our electron is found within this skier. Likewise, let's look at the P orbital. The P orbital has the following shape. And what this P orbital states is there's a 90% probability that our electron is found within this weird shape. Now, for this guy, N must be equal to two.