Please do both parts, thank you!

(a) Consider the following reactions involving the precipitate Fe(OH)3 : Fe(OH)3(s)+3H+Fe3++3H2O,K=103.2,Fe(OH)3(s)+H2OFe(OH)4+H+,K=1018.4, Plot the solubility diagram and calculate the pHmin. (b) Consider the following reactions involving the precipitate Fe(OH)2 : Fe2++2H2OFe(OH)2+2H+,K=109.5,Fe(OH)2(s)+OHFe(OH)3,K=104, Plot the solubility diagram and calculate the pHmin on the same diagram as (a)