The value of $6\frac{8}{15} ÷ \frac{7}{9}\,of\,(1\frac{1}{10}+5\frac{1}{5})+\frac{2}{5}÷7\frac{1}{5}$ is:

$\frac{25}{16}$ $\frac{5}{14}$ $\frac{25}{18}$ $\frac{5}{18}$

$\frac{25}{18}$