Question The graph of f(x) = -x + ax +bx+c is sketched below. The x-intercepts are indicated.

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The graph of f(x) = -x³ + ax² +bx+c is sketched below. The x-intercepts are indicated. 11.1 11.2 11.3 0 A BI $ Calculate the values of a, b and c. Calculate the x-coordinates of A and B. the turning points of f. For which values of x will f'(x) <0? The graph of f(x) = -x³ + ax² +bx+c is sketched below. The x-intercepts are indicated. 11.1 11.2 11.3 0 A BI $ Calculate the values of a, b and c. Calculate the x-coordinates of A and B. the turning points of f. For which values of x will f'(x) <0?