 Okay, let's try this one. So this is phosphoric acid H3PO4, so let's do the first step of this reaction. Always when you have this, it's going to react with the base in there, the most basic thing of course is the water, which honestly is probably the solvent in this reaction and probably the phosphoric acid is just a catalyst. So a lot of times this may be written like this, and then sometimes they'll even say like that, okay? Either way, it's doing the same thing, right? So phosphoric acid H3PO4 and water of course is going to first perform the acid base reaction and the important thing is the hydronium ion. And remember it's the hydronium ion that's the actual acid and the actual catalyst, in fact. And then of course you're going to make the phosphate ion. So remember, no charge on this side of the reaction, no charge on this side, okay? So the catalyst here is, or that acid is going to perform essentially another acid base reaction. It looks like a weird acid base reaction because these electrons aren't like lone pair electrons, you know? But you've got a choice of where this proton's going to end up. It's going to either end up over here on this side or on this side. It'll probably end up on this side here, definitely, not just probably. Definitely. Because you've got a choice between a secondary carbocation and a tertiary, right? Which one's more stable? Of course the tertiary is, so that's going to form more readily. So we'll draw our arrow like that and I'll just stick that hydrogen on there just to kind of emphasize. So we'll put two hydrogens, we'll just say that. Just to emphasize, okay? This lost that double bond, so we've got the carbocation there. Very good electrophile, remember, whenever you see positive charge, hit it, you know? You want to hit it, smell those positive charges out. So what did we make with this? We made water, right? Because we deprotonated it, very good, right? Relatives, right? It's all relatives. 52 days. So this is not a stereocenter, we don't have to worry about it anymore. This is a tertiary carbocation we don't have to worry about, so... Let's just write that down. Do we have to worry about hydride, methyl, any type of shifts or anything? No, it's already stable enough, right? So what are we going to do? We're going to attack. Remember, this is a trigonal planar, right? So it can attack from the top or the bottom or the back or the front, whichever way you want to look. And if we erase, because that's not a stereocenter, so let's just erase those hydrogens, because they don't really matter anymore, right? So when we add that, is there going to be four different groups on there? Yes, right? So we're going to have to have the two enantiomers, yeah, we're going to make a stereocenter. So, yeah, exactly, that's the way to count them. Okay, so you could just put whichever one you want. I'm going to put just this one forward and we'll put the water going back, okay? Remember, water in this is the solvent, okay? So there's going to be another water molecule. So what we can do now, sometimes they'll even say just to emphasize for you guys that they'll say water in excess or something like that. And we could even already put plus enantiomers like that. And then when we do that, we get our final product, that alcohol, plus it's an enantiomer. Like so? Yeah. Okay, cool. Go have some lunch, guys. Good job.