Construct potentiometric titration curves in pH-V and Δ

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Construct potentiometric titration curves in pH-V and ΔpH / ΔV-V coordinates and determine the concentration of the CH3COOH solution (g / l) if, when titrating 10.00 ml of this acid with 0.1000 M KOH, the following results were obtained:
V (KOH), ml 15.00 18.00 19.00 19.50 19.90 20.00 20.10 20.50 21.00
pH 5.22 5.71 6.04 6.35 7.05 8.79 10.52 11.22 11.51