(c) Find the relative extrema and intervals of increase and decrease of f. (d) Find the second derivative f"(x). (e) Find the inflection points and intervals where f is concave up or concave down.1. (3 A- -) Let mpg9)? (a) Find the open intervals on which f is increasing or decreasing. (b) Find the relative extrema of f if they exist. 2. f, _' } Let x) = 31*\" 4:c3. (a) Find f'(:r). (b) Find the critical numbers of f