Let $f(x) = 2\sqrt{x}-6x$ for $x > 0$. Find the open intervals on which $f$ is increasing (decreasing). Then determine the $x$-coordinates of all relative maxima (minima).

1.	$f$ is increasing on the intervals
2.	$f$ is decreasing on the intervals
3.	The relative maxima of $f$ occur at $x$ =
4.	The relative minima of $f$ occur at $x$ =

Notes: In the first two, your answer should either be a single interval, such as (0,1), a comma separated list of intervals, such as (-inf, 2), (3,4), or the word "none".

In the last two, your answer should be a comma separated list of $x$ values or the word "none".