I need help with solving this question.:

You have solution A and you take 1 mL of this and mix it with 9 mL of PBS to make solution B.

Next, you take 0.1 mL of solution B and mix it with 9.9 mL of PBS to make solution C.

Finally, you take 1 mL of solution C and add it to 9 mL of PBS to make solution D.

Record the dilution of each solution B, C, and D. Then determine the total serial dilution of this series. If it helps draw a diagram.