4 The curve \(C\) has equation
$$4 y ^ { 3 } + ( x + y ) ^ { 6 } = 109 .$$
- Show that, at the point \(( - 4,3 )\) on \(C , \frac { \mathrm { dy } } { \mathrm { dx } } = \frac { 1 } { 17 }\).
- Find the value of \(\frac { d ^ { 2 } y } { d x ^ { 2 } }\) at the point \(( - 4,3 )\).