Amixture of lipids is applied to a silica gel column, and the column is then washed with increasingly polar solvents. the mixture consists of phosphatidylserine, phosphatidylethanolamine, phosphatidylcholine, cholesteryl palmitate (a sterol ester), sphingomyelin, palmitate, n-tetradecanol (tetradecyl = 14), triacylglycerol, and cholesterol. in what order do you expect the lipids to elute from the column? explain your reasoning. (note: assume neutral ph; also some lipids could elute together) (hint: look at the structures! )