Here is the graph of the derivative of a function f(2), whose domain is the open interval (-5, 5). f'(x) 2- + X. -UT -2 -1 0 + -I- _1- -2- 3- -4 -5- Answer the following questions. Explain your answers briefly. (a) At what x-value does the function f(@) have an extremum? Is it a local maximum or minimum? (b) At what x-value does the function f(@:) have a point of inflection? (c) State the interval(s) where f(x) is concave up and down? Time left