Five minus zero factorial. Well this is zero factorial is one by definition and so this is going to be five factorial over five factorial which is going to be equal to one. Once again, I like reasoning through it instead of blindly applying a formula, but I just wanted to show you that these, these two ideas are consistent. So let's keep going. And I'm going to do x equals one all the way up to x equals five and if you are inspired, and I encourage you to be inspired, try to fill out the whole thing. What's the probability that x equals one, two, three, four, or five? So let's go to the probability that x equals two, oh sorry, x equals one.