 Okay, so let's do this one if you don't mind. So it says classify each of the following reactions as an addition, elimination, substitution, or rearrangement. And then I'll ask you some extra questions about it just to see if you have a paying attention, okay? So, hey, what do you think that is? What kind of reaction? Radical substitution. So it's a substitution reaction. You already took my second question away. Oh, that's a radical reaction. So that was the kind of substitution. So, substitution reaction. And this is a radical chlorination. You can see that because of the light. That really helps out a lot, okay? To identify that it's a radical reaction. B, what kind of reaction are we doing there? Rearrangement. And it's a specific rearrangement that you have been taught. Do you remember what kind it is? Hydrogen shift. Yeah, it's a hydrogen shift. So if you want to draw the mechanism, right, you can think where those two hydrogens there, one of those hydrogens is going to go over there and make the carbocation instead of a primary or secondary, okay? This is a secondary. Remember, it's a more stable carbocation in the front. Okay, for C, what kind of reaction is that? Elimination. Elimination. Okay, so that's an elimination reaction. So, what functional group does the starting material have in it? Alcohol. Yeah, so it goes from an alcohol to a... Alkene. Okay, so how do you go from a secondary alcohol to an alkene? What do you add to it? What's that? Sulfuric acid. Sulfuric acid, okay? So that'll give you an elimination from an alcohol to an alkene. What about this one? Addition. This is an addition reaction, right? What kind of an addition reaction? Hydrogromination. Yeah, very good. Hydrogromination, man. You're really different. You should be proud of yourself. Okay, I'm going to ask you a hard question so if you can get this one. Ether, what is that doing? Is that a reagent? It's the solvent. The solvent. So what does it do in the reaction? It dissolves the alkene. Yeah, it just dissolves the stuff. It's like kind of the swimming pool for the reactants to swim around it. So it actually doesn't participate in the reaction, okay? And then the last one? Rearrangement. Yeah, there's another rearrangement, but I think I've tortured you enough. Any other questions on that one? Any questions? Okay, one.