This figure is the reference of cell voltage $($ Vsofc $)$ from experimental Which used fuel as $89\%$H$2$ and $11\%$ H$2$O$,$ with fuel utilization $=0\mathrm{.}85$ at $900$ deag.C

$-$ can you calculate cell voltage of sofc to validate with these current density $?$

$-$ or guide me how to do this because i have tired but still got some Errors.