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. So the probability that x equals one is going to be equal to, well how do you get one head? Well it could be the first one could be head and then the rest of them are going to be tails. The second one could be head and then the rest of them are going to be tails.