Question: On the other hand, suppose the graph above is that of the derivative f ?

of a function f. For the interval -1 ?? x ? 2, tell where the function f is

(i) increasing; \(\left( -0.4,0.4 \right)\cup \left( 1.4,\,2 \right)\)

(ii) decreasing. \(\left( -1,-0.4 \right)\cup \left( 0.4,\,\,1.4 \right)\)

(iii) Tell whether f has any extrema, and if so, where they are.