Answer the following questions about the functions whose derivatives are given. a. What are the critical points of ? b. On what open intervals is

Answer the following questions about the functions whose derivatives are given.

a. What are the critical points of ƒ?

b. On what open intervals is ƒ increasing or decreasing?

c. At what points, if any, does ƒ assume local maximum and minimum values?

'(x) = (x 7)(x + 1)(x + 5)