Please label the species present at the beginning, half
titration point, end point, and past the end point.

I already did HCl so you can use that as an
example.

1: 25.00 mL 0.1 M HCl titrated with 50 mL 0.1 M
NaOH

2: 25.00 mL 0.1 M HC2H3O2 titrated with 50 mL 0.1 M
NaOH

3: 25.00 mL 0.05 M H3PO4 titrated with 50 mL 0.1 M
NaOH

4: 25.00 mL of unknown acid titrated with 50 mL 0.1 M NaOH
(since this is an unknown acid I dont know whether we put species
here or not, but I included the graph regardless)