The following data is given for a ternary $\text{A B C}$ gas mixture at $12\: \mathrm{MPa}$ and $308 \: \mathrm{K}$:
$$\begin{array}{|c|c|c|c|} \hline \text{Component} i \rightarrow & A& B & C \\ \hline y_{i} & 0.55 & 0.20 & 0.25 \\ \hline \hat{\phi}_{i} & 0.75 & 0.80 & 0.95 \\ \hline \end{array}$$
$y_{i}$ : mole fraction of component $i$ in the gas mixture
$\hat{\phi}_{i}$ : fugacity coefficient of component $i$ in the gas mixture at $12 \: \mathrm{MPa}$ and $308 \: \mathrm{K}$
The fugacity of the gas mixture is $\_\_\_\_\_\_$ $\mathrm{MPa}$ (rounded off to $3$ decimal places).
