Let f(x)=14x3−7x+2. Then
1. f is increasing on the interval(s)
2. f is decreasing on the interval(s)
3. f has local maximum(a) at x=
4. f has local minimum(a) at x=
5. f is concave up on the interval(s)
6. f is concave down on the interval(s)
7. f has inflection point(s) at