Calculate the potential of the electrochemical cell and determine if it is spontaneous as written at $25C.$

$Pt(s)|S{n}^{2+}(0\mathrm{.}0049M),S{n}^{4+}(0\mathrm{.}12M)||F{e}^{3+}(0\mathrm{.}12M),F{e}^{2+}(0\mathrm{.}0034M)|Pt(s)$

$E_{S\frac{n^4}{S}{n}^{2+}}=0\mathrm{.}154V,E_{F\frac{e^3}{\frac{?}{?}}F{e}^{2+}}=0\mathrm{.}771V$

$E_{\text{c}\text{e}\text{l}\text{l}}={}_{\text{i}\text{n}\text{c}\text{o}\text{r}\text{r}\text{e}\text{c}\text{t}}V$

Is the electrochemical cell spontaneous or not spontaneous as written at $25C?$

spontaneous

not spontaneous