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Use the diagram that follows or make an exact copy of it for your assignment. . a) The rectangles represent test tubes. Each dash at the side of a tube marks 0.2 ml volume. Draw a line across the first tube at 2 ml for the total volume of solution in the tube. This is a stock solution of 20 mg/ml. represents 1 milligram of solute. Draw the solute milligrams in the tube, equally distributed in the solution. b) In your drawing what do you show for the number of milligrams per 0.2 ml? C) You are going to prepare 2 ml of 12 mg/ml, using the stock + water. The second tube is the dilution tube. Draw a line at the appropriate level to show the total volume of 20 mg/ml stock you put in. Draw the solute milligrams in the tube, taken from the stock. Next draw a line in a different color to show how much water you add. Fill in the water with hatch marks II/ in the water color to fill the volume space up to the line. d) Record the volume of stock and volume of water you added to the second tube. e) Use the third tube to show the results of mixing the second tube's contents so the solute is uniformly distributed in the tube. f) Explain how you can calculate the final concentration of your tube to see if it is 12 mg/ml. g) After the class discussion, describe how the dilution can be made without a calculator.