DNA frоm three sаmples hаve been sepаrated by agarоse gel electrоphoresis: a DNA size marker ("M") and two samples (S1 and S2). Answer the questions below as they pertain to this image. Based on the information provided, which letter would represent the location where the DNA samples would have been loaded prior to electrophoresis. The position represented by the letter: [letter1] In which direction would the DNA have been migrating during electrophoresis? [letter2] Of the DNA bands marked with the letters A, B, and C, which is the largest? [letter3] Based on the direction of DNA migration, which letter would represent the negatively charged electrode? [letter4] Which DNA band would most likely be 3,000 base pairs in length? [letter5]