3. The function g is defined by
$$g ( x ) = \frac { 6 x } { 2 x + 3 } \quad x > 0$$
- Find the range of g .
- Find \(\mathrm { g } ^ { - 1 } ( x )\) and state its domain.
- Find the function \(\operatorname { gg } ( x )\), writing your answer as a single fraction in its simplest form.