im doing a acids and bases post lab for chem $2$ and need help ASAP!!! for the problems below $($ USE THE DATA IN THE PICTURE TO ANSWER THE QUESTIONS BELOW$)$

$1.$

For each acid below, indicate the unknown identity $($A$,$ B$,$ or C$)($ based on graphs a$-$c which acid best corresponds to it$)$

$-$HCl

$-$H$3$PO$4$

$-$H$2$C$2$O$4$

$2.$ WHAT IS THE MOLARITY DETERMINED FOR YOUR SOLUTION OF HCl

$3.$ WHAT IS THE MOLARITY DETERMINED FOR YOUR SOLUTION OF H$2$PO$4$

$4.$ WHAT IS THE MOLARITY DETERMINED FOR YOUR SOLUTION OF H$2$C$2$O$4$

$5.$Please explain how half equivalence points were used in the identification of the acids you titrated. Be sure to use the values you determined for the acids titrated in your explanation.