Alright, guys. So let's look at this example here. So every corner, every edge is a carbon, right? So we know that carbon must make four bonds this carbon. Here we see it making one bond to that carbon. So it must have three inches on it to get to four. This carbon here we said, making 1234 bonds. So it has normal room to accept any hydrogen. So it's fine. This is a carbon here. We see making one bond. So it must have three h is that we don't see to get it to four. Same with this carbon. We see him making one bond, so it must have three hydrogen on it that we don't see. This carbon here is making to bonds 12 So it must have to hydrogen is we don't see. And then this carbon here is making 1234 bonds total. So it's satisfied in terms of being Tetra Valent has no hydrogen on it at all. So let's count how many total carbons we have. We have 123456 carbon. So C six next hydrogen is We have three, 69 11 12. And then how Maney Oxygen's do we have? We have to oxygen's. So this will be your molecular formula C six h 12 02 That would be the former that you should have gotten for this first compound here. Now that we've done that, one try to do this one. This one isn't written as a skeletal formula. I've shown it as an expanded or structural formula. So this one should be a lot easier. Just literally count the number of elements and then give me the structural formula for it. Come back. Let's take a look at it once you've done that.