The given graph of the derivative [math] of a function [math] is shown. Answer the following questions only on the interval [math].


1. On what intervals is [math] increasing?
Answer (in interval notation):

2. On what intervals is [math] decreasing?
Answer (in interval notation):

3. At what values of [math] does [math] have a local maximum?
Answer (separate by commas): [math]

4. At what values of [math] does [math] have a local minimum?
Answer (separate by commas): [math]


Note: You can click on the graph to enlarge the image.