9 The curve \(y = 2 x ^ { 3 } - a x ^ { 2 } + 8 x + 2\) passes through the point \(B\) where \(x = 4\).
- Given that \(B\) is a stationary point of the curve, find the value of the constant \(a\).
- Determine whether the stationary point \(B\) is a maximum point or a minimum point.
- Find the \(x\)-coordinate of the other stationary point of the curve.