pls answer i need it quick. I am in grade 12.

Question 5 [5 points) The graph below shows the derivative f'lx) of a function flx). a) Find the intervals where the function x) is increasing or decreasing (2 marks) b] Find the intervals where the function f(x) is concave up or concave down (2 marks) c) Identify and classify all critical points [1 mark]I