A 100 ml aliquot of 0.2 M zwitterionic form of an amino acid is titrated with 0.4 M HCl.Find the pH at the following points:

A 100 ml aliquot of 0.2 M zwitterionic form of an amino acid is titrated with 0.4 M HCl.Find the pH at the following points: initial, halfway to first eq point, 1st eq point, halfway to second eq point, second eq point, excess HCl. Ka1=5e-3, Ka2=1.79e-10.