Hey, guys. So here let's take a look at this example. It says provide the name of the following alcohols and Al que Holland's and state if their primary secondary or tertiary. So for the first one, we have an alcohol group and we have ah, halogen alcohol groups have higher priority. So the O. H. Is higher priority. So we start numbering the chain near that. Ohh. So 123 So, naming this, we'd say that we have a broening group on carbon three. So to be three bro mo, and then the alcohol is on carbon one. So one three cartons propane. But we change the e tow all because it's an alcohol. So it's one pro open all now, how do we determine if their primary secondary or tertiary we count the carbon with the O. H group as one group? Then we're gonna say that the carbon connected to the O. H, this carbon here it's on Lee connected toe, one other carbon. So this is a primary alcohol. And then we're gonna say that the halogen we treated as one group with the carbon it's connected to and we say that that carbon is connected to only one other carbon. So it's also primary, So both would be primary for the next one. The longest carbon chain is here and we number from the end closest to the alcohol group, the O H Group. So This method group didn't get numbered because it's not part of the longest chain. So it's a substitue int so beyond carbon three. So I'd be three metal. The alcohol group is on carbon 33 southern carbons have obtain, but we change the ending toe All so becomes three Hempton all. And then we're gonna say here that the carbon with the O. H treated as one group this carbon here with the O. H. It's connected to 1 to 3 other carbons. So it's a tertiary alcohol. Then finally here the longest carbon chain is here. Number from the end closest to the halogen. So 1234 and five So the chlorine is on carbon too. So it's two chloral and then five. Carbon chain is painting. We don't change the ending toe all because there's no alcohol anymore and halogen czar named in the beginning, they don't affect the end of the name. Now we say that the carbon with the halogen treated as one group, we see that carbon with the halogen is connected to two other carbons. Therefore, this alcohol Holland is a secondary alcohol, Khallad. So that's the approach we would take in order to name each of these compounds. And the approach we would take toe identify them is being primary, secondary or tertiary.