Alright, guys. So you guys enough time to take a look at this. Remember, every edge, every end is a carbon. So there's a carbon here, here, here and here. Carbon must make four bonds. This one here is only making three bonds that we see. So should have had one h and same with this one. The other two are already making four bonds they don't have. They have no hydrogen at all. So if we take a look, we say the formula is there are four carbons will see four and he really doesn't matter the order, Um, in terms of the number of elements because we're just learning how to read these structures now. So all that's important is getting the right number of each element. So here we have four carbons. Let's move on to hydrogen is next. So we have 1234 Hydrogen nitrogen is typically listed next and oxygen last. So nitrogen is here. It has won two nitrogen and then to oxygen's. So this should have been the formula that you got C four h four and Make sure you go back. If you didn't get this correct and see what exactly might have gone wrong. Remember every edge. Every end is a carbon count the number of bonds that each carbon is making to determine if they have any hydrogen zit. All carbon is Tetra Valent and wants to make four bonds when it's neutral. So if you see making less than four, that's because it has hydrogen czar invisible, and you have to figure out how many it has. So we've done these two together. Let's see if you guys can attempt to do the last example one here on the bottom of the page, come back and see how best I answer this next question.