i need help please

DATA 3.600g Mass of dehydrated milk Mass of recovered casein: Percent recovery of cascin: Mass of recovered lactose: Percent Recovery of lactose: Biuret Test Observations Sample Before Biuret Reagent After Biuret Reagent Your Casein clear idet Control Casein clear pink violet Sucrose Amino Acid clear light bley Summarize (in complete sentences!) which samples had a positive test and which had a negative test for the Biuret test. 5