(a)[1]
Fill in the table for $y = \frac{x}{5}(6 + 2x - x^2)$.
(b)[3]
Sketch the graph of $y = \frac{x}{5}(6 + 2x - x^2)$ for $-3 \le x \le 4$.
(c)[2]
Use a tangent to estimate the gradient of $y = \frac{x}{5}(6 + 2x - x^2)$ at $(-2, 0.8)$.
(d)[3]
Use your graph to solve $x(6 + 2x - x^2) = 10$.