4. A curve has parametric equations
$$x = t ^ { 3 } + 1 , \quad y = \frac { 2 } { t } , \quad t \neq 0$$
- Find an equation for the normal to the curve at the point where \(t = 1\), giving your answer in the form \(y = m x + c\).
- Find a cartesian equation for the curve in the form \(y = \mathrm { f } ( x )\).