\[y = \frac{1}{3}x^{2} - 2x + c \Longrightarrow ветви\ \]
\[вверх.\]
\[x_{0} = \frac{2}{\frac{2}{3}} = 3;\ \ \ \ y_{0} = 5\]
\[\frac{1}{3} \cdot 3^{2} - 2 \cdot 3 + c = 5\]
\[3 - 6 + c = 5\]
\[c = 5 + 3\]
\[c = 8.\]
\[Ответ:при\ c = 8.\]