In this question, we're asked to look at three Amino acids and describe these amino acids and their characteristics. So to start we have a line, we are supposed to first look at if the amino acid is polar, non polar hydrophobic or hydrophobic. So looking at um alan in the substitution on allen is a methyl group right here. This method group does not introduce any polarity into the molecule as it's relatively small and it's only an out pill group. So because it doesn't introduce any polarity into the molecule, we can label this as non polar based on its our group being non polar. The our group similarly does not help the amino acid dissolve in water as it does not introduce an acidic or basic characteristic to the amino acids. So we can also label it as hydrophobic. Our next amino acid is final alunan phenylalanine introduces a final group attached to the alunan. So we have our metal from our original group and then we have the final group added on there. So you can see where the name comes from, Final eleni. So I feel like that's a good way to remember it. If you're trying to memorize these structures for the um cat. Sorry, we're just going to better underline that. So final valentine has a final group on it, which is basically just a benzene ring. So an aromatic ring. Benzene rings are only composed of carbons and hydrogen. So it should clue you in that. This is relatively non polar as well. So we can go ahead and label this as non polar. Furthermore, the exposure, a bunch of hydrocarbons would make this amino acid relatively hydrophobic as well. Our final amino acid is Sistine. Sistine introduces a sulfur in its structure in the long structure that comes off of a methyl group. And then we have our sulfur bonded to a hydrogen, sulfur is a relatively electro negative atom. So introducing it into the amino acid does introduce a molecular dipole. So we are able to label this amino acid as polar. However, even with the additional polarity, this molecule will still remain neutral at physiological ph H. This can be explained by the fact that the molecule will not be deep resonated or protein ated at physiological ph because the sulfur group does not readily lose its hydrogen. Because of this, we can also assume that the molecule is relatively hydrophobic, but we'll just go with labeling these for now, because that's all the question asks for. Okay, thank you.