How?

Use the given graph of the function on the interval (0, 8] to answer the following questions. 1. Where does the function f have a local maximum? Answer (separate by commas): x = C] 2. Where does the function 1' have a local minimum? Answer (separate by commas): m = C] 3. What is the global maximum of 3"? Answer (write 'none' if there is none): C] 4. What is the global minimum off? Answer (write 'none' if there is none): D