A curve has equation $$\(y=x^{n}+q x^{2}+9 x\)$$ ． $$\(\frac{\mathrm{d} y}{\mathrm{~d} x}=3 x^{2}-12 x+9\)$$ （a）Find the value of $$\(n\)$$ ，and the value of $$\(q\)$$ ． $$\[ n=\ldots \ldots \ldots \ldots \ldots \ldots \ldots . . \quad q=\ldots \ldots \ldots \ldots \ldots \ldots . . . \quad \text { [2] } \]$$

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