(Solved): Consider the following graph. (Note: The curve ends at the point (7,6).) (a) Find the interval(s) o ...

Consider the following graph. (Note: The curve ends at the point $(7,6)$.) (a) Find the interval(s) on which $f$ is increasing. (Enter your answer using interval notation.) Your answer cannot be understood or graded. More Information (b) Find the interval(s) on which $f$ is decreasing. (Enter your answer using interval notation.) (c) Find the interval(s) on which $f$ is concave upward. (Enter your answer using interval notation.) (d) Find the interval(s) on which $f$ is concave downward. (Enter your answer using interval notation.)