Leah is titrating permanganate solution of unknown concentration by adding excess potassium iodide, followed by backtitration of the liberated iodine with thiosulfate. By name or number, identify all of the following three statements which would lead to the measured concentration of permangante being lower than the actual concentration: 1) Leah forgets to acidify the permanganate solution 2) Leah accidentally doubles the amount of potassium iodide added 3) Leah rinses her buret with water instead of thiosulfate solution before the back titration