4. The rectangular hyperbola \(H\) has parametric equations
$$x = 4 t , \quad y = \frac { 4 } { t }$$
The straight line with equation \(3 y - 2 x = 10\) intersects \(H\) at the points \(A\) and \(B\).
Given that the point \(A\) is above the \(x\)-axis,
- find the coordinates of the point \(A\) and the coordinates of the point \(B\).
- Find the coordinates of the midpoint of \(A B\).