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Consider the graph of y = f(x) as shown...

Consider the graph of y = f(x) as shown in the following figure.

(i) Find the sum of the roots of the equation f (x) = 0.
(ii) Find the product of the roots of the equation f(x) = 4.
(iii) Find the absolute value of the difference of the roots of the equation f(x) = x+2 .

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