Here is the graph of the derivative of a function f(x), whose domain is the open interval (-5, 5). f' (x) -2 To -2 1 0 W- - F -2 -3 Answer the following questions. Explain your answers briefly. (a) At what x-value does the function f(x) have an extremum? Is it a local maximum or minimum? (b) At what x-value does the function f(x) have a point of inflection? (c) State the interval(s) where f (x) is concave up and down