issig Assignment 9: Problem 7 Previous Problem List Next (1 point) Let f (z) . Find the open intervals on which f is increasing (decreasing). Then determine the -coordinates of all relative maxima (minima) f is increasing on the intervals f is decreasing on the intervals 3. The relative maxima of f occur at r = 4. The relative minima of f occur at a = Notes: In the first two. your answer should either be a single interval, such as (0. 1), a comma separated list of intervals such as (-int. 2), (3 4), or the word "none". In the last two. your answer should be a comma separated list of r values or the word none