\[\boxed{\text{5.337.}}\]
\[10\ с = \frac{10}{60} = \frac{1}{6}\ мин\ \]
\[6\ с = \frac{6}{60} = \frac{1}{10}\ мин\ \]
\[4\ с = \frac{4}{60} = \frac{1}{15}\ мин\ \]
\[20\ с = \frac{20}{60} = \frac{1}{3}\ мин\ \]
\[45\ с = \frac{45}{60} = \frac{3}{4}\ мин\ \]