please show work and how to do this problem step by step thank you

1. The following pentapeptide, Gly-Asp-Lys Met Lys Tyr-Gly, was buffered at pH of 5 and digested with trypsin and then with CNBr to form several fragments. This mixture was then chromatographed on a cation-exchanger (negative charged resin), predict elution order of fragments off the column. SHOW WORK (each fragment with proper charge at pH 5). No need to draw complete structure