0.1 g of iodine are dissolved in 100 mL of water (in the presence of KI). This aqueous solution was been extracted with 18 mL of chloroform. After extraction, 5 ml of the iodine remained in the aqueous solution was titrated with a standard solution of sodium thiosulfate 0.01 M with starch indicator. The volume added for this titration is 3.5 mL of sodium thiosulfate. Calculate the separation’s extraction efficiency