6. determine the amino acid sequence of the following oligopeptide from the experimental data below. i. the amino acid composition is found to be [lys, cys, ile, met, tyr and leu]. ii. the peptide has a molecular weight around 680 da and absorbs at 280 nm. iii. treatment with carboxypeptidase results in leucine and an oligopeptide. iv. cnbr treatment yields a tetrapeptide and a dipeptide. v. trypsin digestion produces an amino acid and a pentapeptide with met on the amino end. vi. chymotrypsin digestion yields an amino acid and a pentapeptide. a. lys-met-cys-ile-tyr- leu d. lys-ile-cys-tyr-met- leu b. lys-met-cys-tyr-ile- leu e. leu-ile-tyr-cys-met-lys c. leu-lys-tyr-cys-met-ile