All right. So Problem 41 is asking for us to describe the structure off the given functional groups. So starting here, read part, eh? We'll start with part, maybe have all keen and on all keen, huh? Characteristic of a double bond between two carbon. So we got a double bond between two carbons Anton's each carbon could handle four bonds. We can have two more other things connected to each of our carbon, So that would be the structure for analogy. Okay. Part B, part B regard alcohol to part B. Alcohol is characteristic of having on h. I'm connected to a carpet. So we're gonna have this carbon, and it will be connected to an O. And okay, we're gonna have ohh connected carbon. And, as usual, that carbon could handle more bonds. Other at a ex parte si party. We have an Esther, and Esther is very similar to carve oxalic acid, right. We have carbon double bonded to Oh, and then we have another oxygen right here. And as usual, it would be connected to a carbon. Okay, So what makes, um, Esther different is that instead of having hydrogen, you know how, um, carbo oxalic acid would normally have h bonded to oxygen right there. So instead of having a hydrogen, we're gonna have another carbon. All right, so, and as usual, these carbons can be connected to other Adams as well. So this this would be a nester. And finally, we have 40 which is a mean, Hey, so I mean, is that you probably remember, would have being nitrogen in it. Shall we have a carbon? And it will be connected to end age too. Or if you wanna write that out, we're gonna have to harder John Adams with neither drink. Okay. And, as usual, that carbon have space board three other bunch. So that would be our structure for me.