8. Let f(x) = e(-2). Name: Part a: (5 points) Determine on what intervals (if any) f(x) is increasing, and on what intervals (if any) f(x) is decreasing. Part b: (5 points) Determine on what intervals (if any) f(x) is concave up, and on what intervals (if any) f(x) is concave down. Jetzt and to ponday for siden Part c:(4 points) For each critical point of f, determine (with explanation) whether that critical point is a local maximum, a local minimum, or neither.