Need help with the plot for the critical point, not the rest of the problem.

gram of solid aluminum phosphate (Al(PO4) (s) is added to 500 L of pure water. Immediately the solid begins to dissolve according to the reactions below. Complete dissolution: Al(PO4) () A1** + PO No K Solid present: Al(PO4) (8) + A1+3 + PO:3 Ksp = 10-12 What is the concentration of dissolved phosphate (in M and mg/L) in the water once equilibrium is achieved? Is the solid still present or has it completely dissolved? Why or why not? If the solid is present, calculate the solid concentration (in M and mg/L). Develop a plot showing the aqueous (dissolved) concentration of PO4" in M) on the Y-axis versus different Al(PO4) (s) additions in M) on the X-axis. Include the critical point that separates whether the solid is completely dissolved or is still present and label your plot appropriately