Bicine $(N,N-$bis $(2$ hydroxyethyl glycine$)$ is another commonly used buffer in biochemistry labs. The structure of the bicine in its fully protonated form is shown below. Draw the titration curve for bicine, assuming the pKa for its free $\frac{C}{O}OH$ group is $2\mathrm{.}3$ and the pKa for its tertiary amino group $(NH+)$ is $8\mathrm{.}3$ Include the isoelectric point in your curve