Okay, So for this problem, you're doing the dehydration reaction and in dehydration reactions. All right, this here for dehydration, basically removing water, and you're going to be forming an AL Keen, which is a carbon carbon double bond. So your water is going to come from your alcohol and this water H 20 is going to come from your alcohol, which is going to be on one carbon, and you're going to grab ah, hydrogen, one of these hydrogen ins from an adjacent carbon. So if you kind of draw it out, call it this way so you can kind of see it easier. So you have moved to call. This are for the rest of your effort cheese. And on this terminal carbon, which is the one in blue, you have a no h and you have your hydrogen. So just to kind of keep it in the back of your mind So again for a dehydration reaction. So ch three ch two ch. So now you loose this hydrogen shown here in green. You lose this alcohol, so you're going to form a new double bond between this carbon and green and the carbon in blue each que plus we'll call this each. Ohh. So this would be your out keen plus water. Okay, let's go to the next one. So again, you're losing h 20 so you're losing an alcohol or Euro age group from this carbon? And because this cyclo plantain is symmetric, it doesn't matter if you grab a hydrogen from either of these two indicated carbons as long as you're grabbing a hydrogen from the adjacent carbon. So, for example, for this problem, let's grab the one on the right. So now you would have your cyclo pen teen plus your water because now you lose this, this form your water and you're left with a double bond on this carbon. No, the last one. So now instead of your alcohol being on a ring at the end of the chain now it's in the middle of a chain. Um, for these for this problem, you can either grab this hydrogen just to make it easier to see where you can grab this hydrogen. And again, just like the cyclo plantain, it's symmetric. So no matter which hydrogen, you remove your going to form the same product. So just for the sake of argument, Let's remove the one on the left in green. So now we have ch three ch. And now this bond right here is going to be come a double bond. So ch plus for a rather ch two ch three plus now your work. So that's all you need. Just so just remember for dehydration, you were losing water and forming an LP.