Cubic functions are so easy!!

Calculus Level 3

$$f(x)$$ is a cubic polynomial such that, $$f (2) = 18$$ and $$f(1) = -1$$ . If $$f(x)$$ has a local maxima at $$x = -1$$ and $$f' (x)$$ has a local minima at $$x = 0$$. Then find value of $$2 f (0)$$.

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