Calculation of Rational Number Division

Consider the rational numbers defined by the equation:

$$ x = 3 +\frac{2}{5} $$

and

$$ y = 1 -\frac{3}{7} $$

Let

$$ z =\frac{x}{y} $$

Calculate the value of $$ z $$ and determine which of the following options represents the correct value of $$ z $$ expressed as a simplified fraction.