Derivatives and Graphs

[MathNoob94]

Hi, I have a test in a few days and we just recently covered how derivatives effect shapes of graph. So critical points, inflection points and local min and Max's around intervals. In my teachers lecture notes we are given some exercises. He has not emailed me back with the solution key. Could someone please explain each question in depth as I am stumbled. Please omit #4 picture is attached .

Thank You in advance!

 

[stapel]

The image is too small for me to read. Please reply with the typed-out text of the exercise(s) on which you are requesting assistance. When you reply, please also include a clear listing of your efforts so far, so we can see where you're needing help. Thank you!