Using the viscosity values given as a function of temperature for glycerin,

a) determine the activation energy as a function of viscosity.(E)

b) find the viscosity value at 15C.

\begin{tabular}{|l|l|l|l|} \hline t/C & -10 & 0 & 20 \\ \hline / (Pa s) & 35,5 & 12 & 1,5 \\ \hline \end{tabular}